| 年份 | 加纳 |
|---|---|
| 2023 | - |
| 2022 | 6.82601 |
| 2021 | 6.84961 |
| 2020 | 6.85709 |
| 2019 | 6.85959 |
| 2018 | 6.81387 |
| 2017 | 6.72725 |
| 2016 | 6.61722 |
| 2015 | 6.47292 |
| 2014 | 6.31082 |
| 2013 | 6.12991 |
| 2012 | 5.92842 |
| 2011 | 5.73236 |
| 2010 | 5.55687 |
| 2009 | 5.38144 |
| 2008 | 5.20997 |
| 2007 | 5.06013 |
| 2006 | 4.95478 |
| 2005 | 4.88685 |
| 2004 | 4.84309 |
| 2003 | 4.83768 |
| 2002 | 4.86719 |
| 2001 | 4.91846 |
| 2000 | 4.98355 |
| 1999 | 5.04758 |
| 1998 | 5.09243 |
| 1997 | 5.11023 |
| 1996 | 5.10388 |
| 1995 | 5.0732 |
| 1994 | 5.01757 |
| 1993 | 4.94062 |
| 1992 | 4.84838 |
| 1991 | 4.74796 |
| 1990 | 4.6416 |
| 1989 | 4.56984 |
| 1988 | 4.53189 |
| 1987 | 4.48582 |
| 1986 | 4.44755 |
| 1985 | 4.43781 |
| 1984 | 4.4105 |
| 1983 | 4.36551 |
| 1982 | 4.37079 |
| 1981 | 4.41083 |
| 1980 | 4.45273 |
| 1979 | 4.5153 |
| 1978 | 4.61114 |
| 1977 | 4.7148 |
| 1976 | 4.80919 |
| 1975 | 4.90945 |
| 1974 | 5.03071 |
| 1973 | 5.15637 |
| 1972 | 5.26838 |
| 1971 | 5.35721 |
| 1970 | 5.43067 |
| 1969 | 5.49184 |
| 1968 | 5.53892 |
| 1967 | 5.5803 |
| 1966 | 5.61042 |
| 1965 | 5.63388 |
| 1964 | 5.66254 |
| 1963 | 5.6932 |
| 1962 | 5.73256 |
| 1961 | 5.79816 |
| 1960 | 5.83573 |