| 年份 | 保加利亚 |
|---|---|
| 2023 | - |
| 2022 | 3.47839 |
| 2021 | 3.40457 |
| 2020 | 3.31282 |
| 2019 | 3.22646 |
| 2018 | 3.16631 |
| 2017 | 3.13766 |
| 2016 | 3.13357 |
| 2015 | 3.16501 |
| 2014 | 3.23632 |
| 2013 | 3.31736 |
| 2012 | 3.38092 |
| 2011 | 3.4067 |
| 2010 | 3.38548 |
| 2009 | 3.33131 |
| 2008 | 3.26149 |
| 2007 | 3.18888 |
| 2006 | 3.1327 |
| 2005 | 3.1049 |
| 2004 | 3.08945 |
| 2003 | 3.06989 |
| 2002 | 3.04281 |
| 2001 | 3.0114 |
| 2000 | 2.95967 |
| 1999 | 2.86405 |
| 1998 | 2.74494 |
| 1997 | 2.61448 |
| 1996 | 2.46742 |
| 1995 | 2.32973 |
| 1994 | 2.27125 |
| 1993 | 2.31766 |
| 1992 | 2.39975 |
| 1991 | 2.48695 |
| 1990 | 2.58514 |
| 1989 | 2.63367 |
| 1988 | 2.6132 |
| 1987 | 2.58935 |
| 1986 | 2.55677 |
| 1985 | 2.49116 |
| 1984 | 2.41044 |
| 1983 | 2.33253 |
| 1982 | 2.25941 |
| 1981 | 2.18028 |
| 1980 | 2.09677 |
| 1979 | 2.01357 |
| 1978 | 1.93443 |
| 1977 | 1.86134 |
| 1976 | 1.79395 |
| 1975 | 1.73312 |
| 1974 | 1.66652 |
| 1973 | 1.58784 |
| 1972 | 1.51276 |
| 1971 | 1.44182 |
| 1970 | 1.36523 |
| 1969 | 1.30032 |
| 1968 | 1.25535 |
| 1967 | 1.23024 |
| 1966 | 1.23138 |
| 1965 | 1.25008 |
| 1964 | 1.27461 |
| 1963 | 1.28496 |
| 1962 | 1.27169 |
| 1961 | 1.2239 |
| 1960 | 1.14253 |