Evaluation of the period of depletion of reserves of some ores and minerals
Contact | |
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Contact organisation | National Statistical Institute |
Contact organisation unit | ‘Environmental and Energy Accounts’ Department |
Contact name | Ivaylo Rangelov |
Contact person function | State expert |
Contact mail address | 2 P. Volov street, 1038 Sofia |
Contact email address | irangelov@nsi.bg |
Contact phone number | +359 2 9857 113 |
Contact fax number | |
Metadata update | |
Metadata last certified | 20 December 2018 |
Metadata last posted | 20 December 2018 |
Metadata last update | 20 December 2018 |
Statistical presentation | |
Data description | Statistical information on depletion of the ores, minerals and fossil fuels which represent a limited, non-renewable resource. In the context of the European economic environmental accounts it aims to collect primary data necessary to compile accounts on non-refundable underground assets of minerals and ores in natural and value terms. Reserves of natural resources are calculated and evaluated as the bowels, without taking into account losses during extraction and processing (enrichment). |
Classification system | - ‘Classification of reserves and resources of solid underground resources’ drawn up in accordance with the Act on the Underground Resources. - NACE.BG 2008 /2 digits/. |
Sector coverage | Exhaustive survey covering all economic entities - holders of concessions for extraction, and companies that have reported receipts from extraction activity for the previous reference year. |
Statistical concepts and definitions | Reserves and resources of underground natural resources - are minerals and ores deposits in the ground or on the ground with a specific geological knowledge about them and economic interest. The following classifying categories exist: Reserves – That part of the underground resources, which are expected to be extracted commercially with some degree of certainty. Proven reserves - Such reserves about which is found they can be technically and economically producible with a high level of certainty (90% or more) given the current technology and relative prices. Probable reserves - reserves are not proven yet, but regarding which is estimated to have more than 50 % chance of being technically and economically producible. Resources - possible reserves, which are at present not regarded as probable but are estimated to have a significant, but less than 50 % chance of being exploitable. |
Statistical unit | Economic entity |
Statistical population | Еconomic entities - holders of concessions for extraction, and companies that have reported receipts from extraction activity for the previous reference year. |
Reference area | Total for the country |
Time coverage | 2012-2017 |
Base period | Not applicable. |
Unit of measure | |
Thousand tons; thousand m3; number; thousand decares; year. | |
Reference period | |
Year | |
Institutional mandate | |
Legal acts and other agreements | - Law on Statistics; - Regulation (EU) No.691/2011 of EP and the Council of 6 July 2011 on European environmental economic accounts |
Data sharing | Not applicable. |
Confidentiality | |
Confidentiality - policy | Law on Statistics in force. According Art. 25 of the Law on Statistics individual data are not published. Dissemination of individual data is possible only in compliance with Art. 26 of the Law on Statistics. |
Confidentiality - data treatment | According Art. 25 of the Law on Statistics individual data are not published. Dissemination of individual data is possible only in compliance with Art. 26 of the Law on Statistics. |
Release policy | |
Release calendar | The date of release of statistical information is indicated in the Release Calendar presenting the results of the statistical surveys carried out by the National Statistical Institute. |
Release calendar access | The calendar is available on the NSI website: http://www.nsi.bg/en/node/480 |
User access | Data on underground reserves is published on the NSI website, item ‘Environment, dub-item 'Underground reserves' in accordance with the Law on Statistics and the European Statistics Code of Practice respecting the professional independence and aimed at objectivity, transparency and equal treatment of all consumers. |
Frequency of dissemination | |
Annual | |
Accessibility and clarity | |
News release | Not applicable. |
Publications | Electronic publication ‘Environment’ |
On-line database | Detailed data on underground reserves are available to all users of the NSI website under the heading Environment: http://www.nsi.bg/en/node/14683/ |
Micro-data access | Not applicable. |
Other | Information service upon request, according to the Rules for the dissemination of statistical products and services in NSI. |
Documentation on methodology | Electronic statistical questionnaire |
Quality documentation | - European Statistics Code of Practice; - A common framework for quality management in the National Statistical System. |
Quality management | |
Quality assurance | - European Statistics Code of Practice; - A common framework for quality management in the National Statistical System. |
Quality assessment | No information. Data quality report is not prepared. |
Relevance | |
User needs | No information. Survey about satisfaction of customers is not conducted. |
User satisfaction | Survey about satisfaction of customers is not conducted. |
Completeness | Exhaustive survey. |
Accuracy and reliability | |
Overall accuracy | The survey is comprehensive and there are no sampling errors. |
Sampling error | The survey is comprehensive and there are no sampling errors. |
Non-sampling error | Not applicable. |
Timeliness and punctuality | |
Timeliness | |
Punctuality | |
Coherence and comparability | |
Comparability - geographical | Not applicable. |
Comparability - over time | By years. |
Coherence - cross domain | |
Coherence - internal | |
Cost and burden | |
Survey about respondents' burden is not conducted. | |
Data revision | |
Data revision - policy | Revision of the data is applied if necessary. |
Data revision - practice | Revision of the data is applied if necessary. |
Statistical processing | |
Source data | Off-line electronic questionnaire filled-in by economic entities - holders of concessions for extraction, and companies that have reported receipts from extraction activity for the previous reference year. |
Frequency of data collection | Annually. |
Data collection | Exhaustive survey covering economic entities - holders of concessions for extraction, and companies that have reported receipts from extraction activity for the previous reference year. |
Data validation | Comparing the data with those reported in the previous year - regarding mistakenly reported data, measure units, number of digits and others. The data validation goes through three stages: •At the data entry from the respondents the questionnaire has logical and arithmetic controls; •At regional level by the NSI Regional Statistical Offices; •At national level by the NSI Head Office. Comparing the data with those reported in the previous year - regarding mistakenly reported data, measure units, number of digits and others. |
Data compilation | Dataset containing all the units on the territory of the country. |
Adjustment | Not applicable. |
Comment |
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Thursday, 20 December 2018 - 11:00
The National Statistical Institute presents results from annual surveys in the domain of environmental statistics for 2017. Detailed data by particular topics are placed under the heading ‘Environment’ on the NSI web site: http://www.nsi.bg.
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Thursday, 21 December 2017 - 11:00
The National Statistical Institute presents results from annual surveys in the domain of environmental statistics for 2016. Detailed data by particular topics are placed under the heading "Environment" on the NSI web site: http://www.nsi.bg.
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Tuesday, 20 December 2016 - 11:00
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Friday, 18 December 2015 - 11:00
The National Statistical Institute presents results from annual surveys in the domain of environmental statistics for 2014. Detailed data by particular topics are placed under the heading "Environment" on the NSI web site: http://www.nsi.bg
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Friday, 19 December 2014 - 11:00
The National Statistical Institute presents results from annual surveys in the domain of environmental statistics for 2013. Detailed data by particular topics are placed under the heading "Environment" on the NSI web site: http://www.nsi.bg
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Friday, 20 December 2013 - 11:00
The National Statistical Institute presents results from annual surveys in the domain of environmental statistics for 2012. Detailed data by particular topics are placed under the heading "Environment" on the NSI web page: http://www.nsi.bg.
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Friday, 14 December 2012 - 11:00
The National Statistical Institute presents results from annual surveys in the domain of environmental statistics for 2011. Detailed data by particular topics are placed under the heading "Environment" on the NSI web page.
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Thursday, 15 December 2011 - 11:00
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Wednesday, 15 December 2010 - 11:00
The National Statistical institute has the pleasure to present to the attention of its users results from the annual surveys in the field of environmental statistics for 2009.
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Tuesday, 15 December 2009 - 11:00
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Statistical Reference Book 2018 (Bulgarian version)
The National Statistical Institute presents to users of statistical information the annual publication - Statistical Reference Book 2018 in Bulgarian.
The Statistical Reference Book presents topical information on the demographic processes as well as the economic, social and cultural development of the Republic of Bulgaria for the 2014 - 2017 period.
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Statistical Yearbook 2017
The National Statistical Institute (NSI) has the pleasure to present to the attention of national and foreign users of statistical information the 84th edition of the ‘Statistical Yearbook of the Republic of Bulgaria’ in printed and electronic format.
It provides current statistical information about the demographic, economic and social development of the country for 2012 - 2016 in different territorial and classification aggregations and breakdowns.
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