| 年份 | 加纳 |
|---|---|
| 2023 | - |
| 2022 | 0.54435 |
| 2021 | 0.550828 |
| 2020 | 0.554759 |
| 2019 | 0.553944 |
| 2018 | 0.549051 |
| 2017 | 0.54215 |
| 2016 | 0.533794 |
| 2015 | 0.524532 |
| 2014 | 0.513129 |
| 2013 | 0.499913 |
| 2012 | 0.48686 |
| 2011 | 0.473795 |
| 2010 | 0.461137 |
| 2009 | 0.448749 |
| 2008 | 0.435969 |
| 2007 | 0.422347 |
| 2006 | 0.407884 |
| 2005 | 0.393091 |
| 2004 | 0.378412 |
| 2003 | 0.365505 |
| 2002 | 0.35358 |
| 2001 | 0.340671 |
| 2000 | 0.32737 |
| 1999 | 0.315108 |
| 1998 | 0.305167 |
| 1997 | 0.297632 |
| 1996 | 0.290434 |
| 1995 | 0.282716 |
| 1994 | 0.276391 |
| 1993 | 0.272618 |
| 1992 | 0.270496 |
| 1991 | 0.268631 |
| 1990 | 0.266181 |
| 1989 | 0.26381 |
| 1988 | 0.263104 |
| 1987 | 0.263548 |
| 1986 | 0.264558 |
| 1985 | 0.267605 |
| 1984 | 0.273799 |
| 1983 | 0.286296 |
| 1982 | 0.304721 |
| 1981 | 0.343865 |
| 1980 | 0.413164 |
| 1979 | 0.45117 |
| 1978 | 0.447034 |
| 1977 | 0.447322 |
| 1976 | 0.454606 |
| 1975 | 0.469865 |
| 1974 | 0.494655 |
| 1973 | 0.528302 |
| 1972 | 0.570758 |
| 1971 | 0.625267 |
| 1970 | 0.670563 |
| 1969 | 0.689452 |
| 1968 | 0.692812 |
| 1967 | 0.687862 |
| 1966 | 0.678338 |
| 1965 | 0.662912 |
| 1964 | 0.639494 |
| 1963 | 0.60849 |
| 1962 | 0.570874 |
| 1961 | 0.527151 |
| 1960 | 0.515087 |