| 年份 | 保加利亚 |
|---|---|
| 2023 | - |
| 2022 | 5.2534 |
| 2021 | 5.21646 |
| 2020 | 5.13577 |
| 2019 | 5.01234 |
| 2018 | 4.87945 |
| 2017 | 4.76737 |
| 2016 | 4.672 |
| 2015 | 4.62093 |
| 2014 | 4.61551 |
| 2013 | 4.57461 |
| 2012 | 4.48064 |
| 2011 | 4.42794 |
| 2010 | 4.40391 |
| 2009 | 4.40293 |
| 2008 | 4.53385 |
| 2007 | 4.78368 |
| 2006 | 5.05097 |
| 2005 | 5.35991 |
| 2004 | 5.71861 |
| 2003 | 6.05685 |
| 2002 | 6.35105 |
| 2001 | 6.59804 |
| 2000 | 6.7623 |
| 1999 | 6.84157 |
| 1998 | 6.87615 |
| 1997 | 6.89135 |
| 1996 | 6.90587 |
| 1995 | 6.94201 |
| 1994 | 7.03089 |
| 1993 | 7.14579 |
| 1992 | 7.27991 |
| 1991 | 7.44593 |
| 1990 | 7.61228 |
| 1989 | 7.75679 |
| 1988 | 7.84455 |
| 1987 | 7.82072 |
| 1986 | 7.74832 |
| 1985 | 7.70843 |
| 1984 | 7.69272 |
| 1983 | 7.726 |
| 1982 | 7.76068 |
| 1981 | 7.72493 |
| 1980 | 7.6469 |
| 1979 | 7.55206 |
| 1978 | 7.44943 |
| 1977 | 7.41016 |
| 1976 | 7.46746 |
| 1975 | 7.54907 |
| 1974 | 7.60042 |
| 1973 | 7.6379 |
| 1972 | 7.70213 |
| 1971 | 7.78454 |
| 1970 | 7.87758 |
| 1969 | 7.99327 |
| 1968 | 8.1401 |
| 1967 | 8.27587 |
| 1966 | 8.35586 |
| 1965 | 8.4118 |
| 1964 | 8.50851 |
| 1963 | 8.64929 |
| 1962 | 8.78251 |
| 1961 | 8.9126 |
| 1960 | 9.01434 |