| 年份 | 加纳 |
|---|---|
| 2023 | - |
| 2022 | 0.499904 |
| 2021 | 0.500909 |
| 2020 | 0.502102 |
| 2019 | 0.50196 |
| 2018 | 0.503168 |
| 2017 | 0.505225 |
| 2016 | 0.508029 |
| 2015 | 0.514073 |
| 2014 | 0.522676 |
| 2013 | 0.53179 |
| 2012 | 0.5405 |
| 2011 | 0.548262 |
| 2010 | 0.5535 |
| 2009 | 0.553738 |
| 2008 | 0.549421 |
| 2007 | 0.543906 |
| 2006 | 0.537472 |
| 2005 | 0.53049 |
| 2004 | 0.524462 |
| 2003 | 0.517456 |
| 2002 | 0.509118 |
| 2001 | 0.50161 |
| 2000 | 0.494415 |
| 1999 | 0.48613 |
| 1998 | 0.477117 |
| 1997 | 0.466724 |
| 1996 | 0.454452 |
| 1995 | 0.441873 |
| 1994 | 0.430077 |
| 1993 | 0.41904 |
| 1992 | 0.408718 |
| 1991 | 0.397811 |
| 1990 | 0.386544 |
| 1989 | 0.376884 |
| 1988 | 0.369085 |
| 1987 | 0.363821 |
| 1986 | 0.360489 |
| 1985 | 0.356393 |
| 1984 | 0.352107 |
| 1983 | 0.353268 |
| 1982 | 0.35897 |
| 1981 | 0.380276 |
| 1980 | 0.426983 |
| 1979 | 0.45372 |
| 1978 | 0.450976 |
| 1977 | 0.451438 |
| 1976 | 0.458506 |
| 1975 | 0.472843 |
| 1974 | 0.491828 |
| 1973 | 0.516425 |
| 1972 | 0.550723 |
| 1971 | 0.598281 |
| 1970 | 0.641697 |
| 1969 | 0.666423 |
| 1968 | 0.6801 |
| 1967 | 0.688556 |
| 1966 | 0.694171 |
| 1965 | 0.693637 |
| 1964 | 0.684205 |
| 1963 | 0.664999 |
| 1962 | 0.636335 |
| 1961 | 0.599035 |
| 1960 | 0.590799 |