| 年份 | 保加利亚 |
|---|---|
| 2023 | - |
| 2022 | - |
| 2021 | 0.00649706 |
| 2020 | 0.00246737 |
| 2019 | 0.00343786 |
| 2018 | 0.00453021 |
| 2017 | 0.00735612 |
| 2016 | 0.00672704 |
| 2015 | 0.0132342 |
| 2014 | 0.0300441 |
| 2013 | 0.0630866 |
| 2012 | 0.0870872 |
| 2011 | 0.089093 |
| 2010 | 0.0111256 |
| 2009 | 0.00267185 |
| 2008 | 0.0431769 |
| 2007 | 0.0440111 |
| 2006 | 0.0873542 |
| 2005 | 0.0463019 |
| 2004 | 0.0431724 |
| 2003 | 0.00290205 |
| 2002 | 0.00432092 |
| 2001 | 0.00750141 |
| 2000 | 0.0025277 |
| 1999 | 0.000624282 |
| 1998 | 0.000637128 |
| 1997 | 0.00778882 |
| 1996 | 0.00777525 |
| 1995 | 0.00628057 |
| 1994 | 0.00761826 |
| 1993 | 0.00843686 |
| 1992 | 0.00216036 |
| 1991 | 0.0010392 |
| 1990 | 0.00108766 |
| 1989 | 0.000385069 |
| 1988 | 0.000441144 |
| 1987 | 0.00053478 |
| 1986 | 0.00181741 |
| 1985 | 0.002533 |
| 1984 | 0.00620428 |
| 1983 | 0.00796523 |
| 1982 | 0.00558417 |
| 1981 | 0.0198325 |
| 1980 | 0.038583 |
| 1979 | - |
| 1978 | - |
| 1977 | - |
| 1976 | - |
| 1975 | - |
| 1974 | - |
| 1973 | - |
| 1972 | - |
| 1971 | - |
| 1970 | - |
| 1969 | - |
| 1968 | - |
| 1967 | - |
| 1966 | - |
| 1965 | - |
| 1964 | - |
| 1963 | - |
| 1962 | - |
| 1961 | - |
| 1960 | - |