| 年份 | 保加利亚 |
|---|---|
| 2023 | - |
| 2022 | 6.89083 |
| 2021 | 7.01833 |
| 2020 | 7.02103 |
| 2019 | 6.78349 |
| 2018 | 6.46922 |
| 2017 | 6.18189 |
| 2016 | 5.88182 |
| 2015 | 5.61013 |
| 2014 | 5.45032 |
| 2013 | 5.35576 |
| 2012 | 5.30014 |
| 2011 | 5.30587 |
| 2010 | 5.37048 |
| 2009 | 5.48661 |
| 2008 | 5.60951 |
| 2007 | 5.67387 |
| 2006 | 5.65424 |
| 2005 | 5.5607 |
| 2004 | 5.41716 |
| 2003 | 5.26388 |
| 2002 | 5.14602 |
| 2001 | 5.06909 |
| 2000 | 5.0254 |
| 1999 | 5.00047 |
| 1998 | 4.95758 |
| 1997 | 4.88273 |
| 1996 | 4.80674 |
| 1995 | 4.72313 |
| 1994 | 4.57732 |
| 1993 | 4.36773 |
| 1992 | 4.13258 |
| 1991 | 3.8969 |
| 1990 | 3.69471 |
| 1989 | 3.61709 |
| 1988 | 3.68975 |
| 1987 | 3.8125 |
| 1986 | 3.92941 |
| 1985 | 4.03794 |
| 1984 | 4.0842 |
| 1983 | 4.05626 |
| 1982 | 4.02507 |
| 1981 | 3.98491 |
| 1980 | 3.90713 |
| 1979 | 3.81439 |
| 1978 | 3.71849 |
| 1977 | 3.62552 |
| 1976 | 3.53403 |
| 1975 | 3.43546 |
| 1974 | 3.34 |
| 1973 | 3.25264 |
| 1972 | 3.16277 |
| 1971 | 3.06896 |
| 1970 | 2.97751 |
| 1969 | 2.88321 |
| 1968 | 2.7818 |
| 1967 | 2.67915 |
| 1966 | 2.57936 |
| 1965 | 2.49023 |
| 1964 | 2.42946 |
| 1963 | 2.4006 |
| 1962 | 2.40224 |
| 1961 | 2.42428 |
| 1960 | 2.44983 |