| 年份 | 保加利亚 |
|---|---|
| 2023 | - |
| 2022 | 4.15058 |
| 2021 | 4.1975 |
| 2020 | 4.24525 |
| 2019 | 4.2972 |
| 2018 | 4.34217 |
| 2017 | 4.38075 |
| 2016 | 4.43214 |
| 2015 | 4.51678 |
| 2014 | 4.64622 |
| 2013 | 4.78191 |
| 2012 | 4.87231 |
| 2011 | 4.90949 |
| 2010 | 4.87684 |
| 2009 | 4.75864 |
| 2008 | 4.59578 |
| 2007 | 4.43596 |
| 2006 | 4.29775 |
| 2005 | 4.21112 |
| 2004 | 4.16767 |
| 2003 | 4.10528 |
| 2002 | 4.01638 |
| 2001 | 3.96817 |
| 2000 | 3.95097 |
| 1999 | 3.96696 |
| 1998 | 4.0905 |
| 1997 | 4.30667 |
| 1996 | 4.54458 |
| 1995 | 4.82174 |
| 1994 | 5.1412 |
| 1993 | 5.44747 |
| 1992 | 5.72362 |
| 1991 | 5.96539 |
| 1990 | 6.13741 |
| 1989 | 6.23642 |
| 1988 | 6.30648 |
| 1987 | 6.36818 |
| 1986 | 6.42232 |
| 1985 | 6.49265 |
| 1984 | 6.61643 |
| 1983 | 6.76971 |
| 1982 | 6.94471 |
| 1981 | 7.15401 |
| 1980 | 7.36344 |
| 1979 | 7.54707 |
| 1978 | 7.67177 |
| 1977 | 7.68634 |
| 1976 | 7.64986 |
| 1975 | 7.63815 |
| 1974 | 7.64901 |
| 1973 | 7.70361 |
| 1972 | 7.75079 |
| 1971 | 7.72162 |
| 1970 | 7.64653 |
| 1969 | 7.54384 |
| 1968 | 7.43584 |
| 1967 | 7.42067 |
| 1966 | 7.52683 |
| 1965 | 7.67564 |
| 1964 | 7.80147 |
| 1963 | 7.89938 |
| 1962 | 8.00714 |
| 1961 | 8.13015 |
| 1960 | 8.26275 |