| 年份 | 加纳 |
|---|---|
| 2023 | - |
| 2022 | 2.56511 |
| 2021 | 2.51913 |
| 2020 | 2.45399 |
| 2019 | 2.37073 |
| 2018 | 2.27619 |
| 2017 | 2.1785 |
| 2016 | 2.08307 |
| 2015 | 1.99422 |
| 2014 | 1.91027 |
| 2013 | 1.82824 |
| 2012 | 1.74639 |
| 2011 | 1.66844 |
| 2010 | 1.60234 |
| 2009 | 1.55102 |
| 2008 | 1.52329 |
| 2007 | 1.53263 |
| 2006 | 1.57197 |
| 2005 | 1.6216 |
| 2004 | 1.67942 |
| 2003 | 1.74385 |
| 2002 | 1.80002 |
| 2001 | 1.84517 |
| 2000 | 1.88689 |
| 1999 | 1.92627 |
| 1998 | 1.9563 |
| 1997 | 1.9726 |
| 1996 | 1.97838 |
| 1995 | 1.97492 |
| 1994 | 1.95753 |
| 1993 | 1.92903 |
| 1992 | 1.90102 |
| 1991 | 1.87387 |
| 1990 | 1.84648 |
| 1989 | 1.8202 |
| 1988 | 1.78569 |
| 1987 | 1.74228 |
| 1986 | 1.69932 |
| 1985 | 1.65644 |
| 1984 | 1.61079 |
| 1983 | 1.57363 |
| 1982 | 1.54076 |
| 1981 | 1.50995 |
| 1980 | 1.49432 |
| 1979 | 1.47277 |
| 1978 | 1.44128 |
| 1977 | 1.41829 |
| 1976 | 1.39621 |
| 1975 | 1.37644 |
| 1974 | 1.36782 |
| 1973 | 1.36857 |
| 1972 | 1.38047 |
| 1971 | 1.40066 |
| 1970 | 1.41274 |
| 1969 | 1.4135 |
| 1968 | 1.41307 |
| 1967 | 1.41 |
| 1966 | 1.40362 |
| 1965 | 1.39915 |
| 1964 | 1.39841 |
| 1963 | 1.39862 |
| 1962 | 1.39431 |
| 1961 | 1.38484 |
| 1960 | 1.38539 |