| 年份 | 保加利亚 |
|---|---|
| 2023 | - |
| 2022 | - |
| 2021 | 0.508957 |
| 2020 | 0.503604 |
| 2019 | 0.498297 |
| 2018 | 0.495086 |
| 2017 | 0.49309 |
| 2016 | 0.490472 |
| 2015 | 0.488953 |
| 2014 | 0.482562 |
| 2013 | 0.478864 |
| 2012 | 0.454017 |
| 2011 | 0.442277 |
| 2010 | 0.430797 |
| 2009 | 0.422597 |
| 2008 | 0.412142 |
| 2007 | 0.408862 |
| 2006 | 0.41205 |
| 2005 | 0.414285 |
| 2004 | 0.42932 |
| 2003 | 0.427378 |
| 2002 | 0.428089 |
| 2001 | 0.43288 |
| 2000 | 0.43157 |
| 1999 | 0.435777 |
| 1998 | 0.428254 |
| 1997 | 0.51708 |
| 1996 | 0.502581 |
| 1995 | 0.475609 |
| 1994 | 0.473851 |
| 1993 | 0.479562 |
| 1992 | 0.473878 |
| 1991 | 0.447618 |
| 1990 | 0.442289 |
| 1989 | 0.433481 |
| 1988 | 0.427548 |
| 1987 | 0.426357 |
| 1986 | 0.426315 |
| 1985 | 0.425197 |
| 1984 | 0.424856 |
| 1983 | 0.426411 |
| 1982 | 0.428149 |
| 1981 | 0.430092 |
| 1980 | 0.431866 |
| 1979 | 0.441539 |
| 1978 | 0.445426 |
| 1977 | 0.447174 |
| 1976 | 0.449844 |
| 1975 | 0.453746 |
| 1974 | 0.472188 |
| 1973 | 0.477905 |
| 1972 | 0.481332 |
| 1971 | 0.484045 |
| 1970 | 0.487893 |
| 1969 | 0.492994 |
| 1968 | 0.49632 |
| 1967 | 0.498903 |
| 1966 | 0.504477 |
| 1965 | 0.507913 |
| 1964 | 0.51324 |
| 1963 | 0.512246 |
| 1962 | 0.518411 |
| 1961 | 0.535306 |
| 1960 | - |