| 年份 | 贝宁 |
|---|---|
| 2023 | - |
| 2022 | - |
| 2021 | 29.2 |
| 2020 | 29.7 |
| 2019 | 30.2 |
| 2018 | 30.7 |
| 2017 | 31.1 |
| 2016 | 31.5 |
| 2015 | 31.9 |
| 2014 | 32.3 |
| 2013 | 32.8 |
| 2012 | 33.3 |
| 2011 | 33.7 |
| 2010 | 34 |
| 2009 | 34.4 |
| 2008 | 34.7 |
| 2007 | 35 |
| 2006 | 35.4 |
| 2005 | 35.8 |
| 2004 | 36.3 |
| 2003 | 36.9 |
| 2002 | 37.6 |
| 2001 | 38.3 |
| 2000 | 39.1 |
| 1999 | 39.8 |
| 1998 | 40.4 |
| 1997 | 41 |
| 1996 | 41.5 |
| 1995 | 42 |
| 1994 | 42.5 |
| 1993 | 43.1 |
| 1992 | 43.7 |
| 1991 | 44.4 |
| 1990 | 45.1 |
| 1989 | 45.8 |
| 1988 | 46.5 |
| 1987 | 47.2 |
| 1986 | 47.7 |
| 1985 | 48.3 |
| 1984 | 48.9 |
| 1983 | 49.5 |
| 1982 | 50.2 |
| 1981 | 50.8 |
| 1980 | 51.5 |
| 1979 | 52.3 |
| 1978 | 53 |
| 1977 | 53.7 |
| 1976 | 54.4 |
| 1975 | 55.1 |
| 1974 | 55.8 |
| 1973 | 56.5 |
| 1972 | 57.1 |
| 1971 | 57.8 |
| 1970 | 58.4 |
| 1969 | 59.1 |
| 1968 | 59.7 |
| 1967 | 60.3 |
| 1966 | 61 |
| 1965 | 61.6 |
| 1964 | 62.2 |
| 1963 | 62.7 |
| 1962 | 63.2 |
| 1961 | 63.7 |
| 1960 | 64.1 |