| 年份 | 保加利亚 |
|---|---|
| 2023 | - |
| 2022 | 5.08815 |
| 2021 | 5.15964 |
| 2020 | 5.15099 |
| 2019 | 5.002 |
| 2018 | 4.7794 |
| 2017 | 4.55397 |
| 2016 | 4.33283 |
| 2015 | 4.14228 |
| 2014 | 4.01771 |
| 2013 | 3.94539 |
| 2012 | 3.91722 |
| 2011 | 3.93404 |
| 2010 | 4.00126 |
| 2009 | 4.115 |
| 2008 | 4.2416 |
| 2007 | 4.34566 |
| 2006 | 4.39922 |
| 2005 | 4.39179 |
| 2004 | 4.3376 |
| 2003 | 4.25954 |
| 2002 | 4.18085 |
| 2001 | 4.12314 |
| 2000 | 4.10074 |
| 1999 | 4.09558 |
| 1998 | 4.08092 |
| 1997 | 4.05252 |
| 1996 | 4.01786 |
| 1995 | 3.94863 |
| 1994 | 3.80913 |
| 1993 | 3.61594 |
| 1992 | 3.39403 |
| 1991 | 3.16393 |
| 1990 | 2.97208 |
| 1989 | 2.90592 |
| 1988 | 2.98503 |
| 1987 | 3.12228 |
| 1986 | 3.26695 |
| 1985 | 3.41362 |
| 1984 | 3.4998 |
| 1983 | 3.50662 |
| 1982 | 3.50038 |
| 1981 | 3.47319 |
| 1980 | 3.39774 |
| 1979 | 3.30282 |
| 1978 | 3.21039 |
| 1977 | 3.12346 |
| 1976 | 3.03529 |
| 1975 | 2.94136 |
| 1974 | 2.85046 |
| 1973 | 2.76459 |
| 1972 | 2.68216 |
| 1971 | 2.6055 |
| 1970 | 2.52501 |
| 1969 | 2.43413 |
| 1968 | 2.33241 |
| 1967 | 2.22283 |
| 1966 | 2.10476 |
| 1965 | 1.98037 |
| 1964 | 1.87457 |
| 1963 | 1.80039 |
| 1962 | 1.76764 |
| 1961 | 1.78029 |
| 1960 | 1.82241 |