| 年份 | 比利时 |
|---|---|
| 2023 | - |
| 2022 | 1.847 |
| 2021 | 1.883 |
| 2020 | 1.921 |
| 2019 | 1.959 |
| 2018 | 1.999 |
| 2017 | 2.039 |
| 2016 | 2.081 |
| 2015 | 2.124 |
| 2014 | 2.167 |
| 2013 | 2.211 |
| 2012 | 2.256 |
| 2011 | 2.302 |
| 2010 | 2.349 |
| 2009 | 2.397 |
| 2008 | 2.445 |
| 2007 | 2.495 |
| 2006 | 2.546 |
| 2005 | 2.597 |
| 2004 | 2.65 |
| 2003 | 2.704 |
| 2002 | 2.759 |
| 2001 | 2.814 |
| 2000 | 2.871 |
| 1999 | 2.935 |
| 1998 | 3.004 |
| 1997 | 3.076 |
| 1996 | 3.149 |
| 1995 | 3.223 |
| 1994 | 3.3 |
| 1993 | 3.378 |
| 1992 | 3.458 |
| 1991 | 3.539 |
| 1990 | 3.623 |
| 1989 | 3.708 |
| 1988 | 3.796 |
| 1987 | 3.885 |
| 1986 | 3.977 |
| 1985 | 4.07 |
| 1984 | 4.165 |
| 1983 | 4.263 |
| 1982 | 4.363 |
| 1981 | 4.465 |
| 1980 | 4.619 |
| 1979 | 4.804 |
| 1978 | 4.995 |
| 1977 | 5.194 |
| 1976 | 5.4 |
| 1975 | 5.52 |
| 1974 | 5.642 |
| 1973 | 5.767 |
| 1972 | 5.894 |
| 1971 | 6.024 |
| 1970 | 6.157 |
| 1969 | 6.293 |
| 1968 | 6.431 |
| 1967 | 6.572 |
| 1966 | 6.716 |
| 1965 | 6.863 |
| 1964 | 7.012 |
| 1963 | 7.165 |
| 1962 | 7.321 |
| 1961 | 7.446 |
| 1960 | 7.54 |