| Number | Concept | Description |
|---|---|---|
| 1 | Data description | Births and deaths are period sets registered at the moment of occurrence and forming the set for the calendar year. |
| 2 | Classification used | Unified Classification of Administrative-Territorial and Territorial Units (UCATTU) |
| 3 | Coverage | The number of live births includes all live born children in the reference year with usual residence (present address) in the eight cities, their Larger Urban Zones and in the contry. The number of deaths includes all dead persons with usual residence (present address) in the eight cities, their Larger Urban Zones and in the contry. |
| 4 | Unit of measure | Number |
| 5 | Reference period | as of 31-st of December |
| 6 | Time coverage | 2005 - 2009 |
| 7 | Release policy | The date of the statistical information release is shown in the Calendar of the NSI statistical surveys. |
| 8 | Dissemination format | • www.nsi.bg |
| 9 | Methodological documents | • Methodology for studing of births and deaths; • Compilation of variable definitions - Eurostat |
| 10 | Source data | Data are collected by the NSI. Data source on the live births and deaths is the National civil registration system (ESGRAON). Births are registred through document – template "Certificate of birth". Deaths are registred through document – template "Certificate of death". |
| 11 | Frequency of data collection | Yearly |
| 12 | Data collection method | Exhaustively for all registered live births and deaths during the year in the Urban Audit spatial units. |
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