| 年份 | 冈比亚 |
|---|---|
| 2023 | - |
| 2022 | 0.430948 |
| 2021 | 0.438498 |
| 2020 | 0.442254 |
| 2019 | 0.441418 |
| 2018 | 0.438888 |
| 2017 | 0.438389 |
| 2016 | 0.439905 |
| 2015 | 0.44338 |
| 2014 | 0.448827 |
| 2013 | 0.456576 |
| 2012 | 0.466413 |
| 2011 | 0.477136 |
| 2010 | 0.488753 |
| 2009 | 0.501876 |
| 2008 | 0.515457 |
| 2007 | 0.52976 |
| 2006 | 0.546485 |
| 2005 | 0.566212 |
| 2004 | 0.588622 |
| 2003 | 0.614357 |
| 2002 | 0.632104 |
| 2001 | 0.63819 |
| 2000 | 0.64141 |
| 1999 | 0.641499 |
| 1998 | 0.6387 |
| 1997 | 0.633836 |
| 1996 | 0.629905 |
| 1995 | 0.629707 |
| 1994 | 0.637912 |
| 1993 | 0.658152 |
| 1992 | 0.679834 |
| 1991 | 0.69398 |
| 1990 | 0.704213 |
| 1989 | 0.714002 |
| 1988 | 0.724707 |
| 1987 | 0.735784 |
| 1986 | 0.747979 |
| 1985 | 0.762053 |
| 1984 | 0.777929 |
| 1983 | 0.768883 |
| 1982 | 0.735247 |
| 1981 | 0.703375 |
| 1980 | 0.667681 |
| 1979 | 0.628054 |
| 1978 | 0.58662 |
| 1977 | 0.544642 |
| 1976 | 0.503803 |
| 1975 | 0.463186 |
| 1974 | 0.422409 |
| 1973 | 0.400404 |
| 1972 | 0.397582 |
| 1971 | 0.395192 |
| 1970 | 0.392954 |
| 1969 | 0.390175 |
| 1968 | 0.387626 |
| 1967 | 0.384721 |
| 1966 | 0.381128 |
| 1965 | 0.378192 |
| 1964 | 0.375261 |
| 1963 | 0.37235 |
| 1962 | 0.369463 |
| 1961 | 0.365841 |
| 1960 | 0.361934 |