| 年份 | 保加利亚  | 
                                                            
|---|---|
| 2023 | - | 
| 2022 | 4.20537 | 
| 2021 | 4.11828 | 
| 2020 | 4.07133 | 
| 2019 | 4.04726 | 
| 2018 | 4.17192 | 
| 2017 | 4.43609 | 
| 2016 | 4.72045 | 
| 2015 | 5.03827 | 
| 2014 | 5.39419 | 
| 2013 | 5.71807 | 
| 2012 | 5.99345 | 
| 2011 | 6.22146 | 
| 2010 | 6.36575 | 
| 2009 | 6.42137 | 
| 2008 | 6.44699 | 
| 2007 | 6.46572 | 
| 2006 | 6.47508 | 
| 2005 | 6.50012 | 
| 2004 | 6.58403 | 
| 2003 | 6.69225 | 
| 2002 | 6.80825 | 
| 2001 | 6.94021 | 
| 2000 | 7.05078 | 
| 1999 | 7.12545 | 
| 1998 | 7.13716 | 
| 1997 | 7.02961 | 
| 1996 | 6.8744 | 
| 1995 | 6.76025 | 
| 1994 | 6.67799 | 
| 1993 | 6.64966 | 
| 1992 | 6.6323 | 
| 1991 | 6.56139 | 
| 1990 | 6.47395 | 
| 1989 | 6.39646 | 
| 1988 | 6.32535 | 
| 1987 | 6.32986 | 
| 1986 | 6.43018 | 
| 1985 | 6.54218 | 
| 1984 | 6.60793 | 
| 1983 | 6.64841 | 
| 1982 | 6.71466 | 
| 1981 | 6.79558 | 
| 1980 | 6.8749 | 
| 1979 | 6.96623 | 
| 1978 | 7.08159 | 
| 1977 | 7.19246 | 
| 1976 | 7.27201 | 
| 1975 | 7.35037 | 
| 1974 | 7.50179 | 
| 1973 | 7.70382 | 
| 1972 | 7.8927 | 
| 1971 | 8.08152 | 
| 1970 | 8.22111 | 
| 1969 | 8.19453 | 
| 1968 | 8.01275 | 
| 1967 | 7.76747 | 
| 1966 | 7.49582 | 
| 1965 | 7.24653 | 
| 1964 | 7.08306 | 
| 1963 | 7.02245 | 
| 1962 | 7.04949 | 
| 1961 | 7.16202 | 
| 1960 | 7.36927 |