| 年份 | 保加利亚 |
|---|---|
| 2023 | - |
| 2022 | 4.39448 |
| 2021 | 4.28314 |
| 2020 | 4.23883 |
| 2019 | 4.25353 |
| 2018 | 4.22646 |
| 2017 | 4.13331 |
| 2016 | 4.08542 |
| 2015 | 4.06317 |
| 2014 | 4.05466 |
| 2013 | 4.18293 |
| 2012 | 4.43687 |
| 2011 | 4.71176 |
| 2010 | 5.02326 |
| 2009 | 5.37642 |
| 2008 | 5.70424 |
| 2007 | 5.9843 |
| 2006 | 6.21687 |
| 2005 | 6.36658 |
| 2004 | 6.4299 |
| 2003 | 6.45832 |
| 2002 | 6.47566 |
| 2001 | 6.48704 |
| 2000 | 6.51802 |
| 1999 | 6.59971 |
| 1998 | 6.69643 |
| 1997 | 6.79672 |
| 1996 | 6.91546 |
| 1995 | 7.02356 |
| 1994 | 7.10454 |
| 1993 | 7.13353 |
| 1992 | 7.05937 |
| 1991 | 6.94022 |
| 1990 | 6.86069 |
| 1989 | 6.81601 |
| 1988 | 6.82232 |
| 1987 | 6.83639 |
| 1986 | 6.79593 |
| 1985 | 6.72836 |
| 1984 | 6.65383 |
| 1983 | 6.57687 |
| 1982 | 6.56921 |
| 1981 | 6.65321 |
| 1980 | 6.75292 |
| 1979 | 6.81587 |
| 1978 | 6.86062 |
| 1977 | 6.93483 |
| 1976 | 7.02828 |
| 1975 | 7.12411 |
| 1974 | 7.23424 |
| 1973 | 7.36757 |
| 1972 | 7.49086 |
| 1971 | 7.57632 |
| 1970 | 7.65773 |
| 1969 | 7.81448 |
| 1968 | 8.02714 |
| 1967 | 8.22431 |
| 1966 | 8.41643 |
| 1965 | 8.55976 |
| 1964 | 8.52971 |
| 1963 | 8.3336 |
| 1962 | 8.08172 |
| 1961 | 7.82563 |
| 1960 | 7.60223 |