| 年份 | 加纳 |
|---|---|
| 2023 | - |
| 2022 | 8.92183 |
| 2021 | 8.82048 |
| 2020 | 8.73735 |
| 2019 | 8.70761 |
| 2018 | 8.75123 |
| 2017 | 8.85087 |
| 2016 | 8.99212 |
| 2015 | 9.16193 |
| 2014 | 9.33821 |
| 2013 | 9.50698 |
| 2012 | 9.66808 |
| 2011 | 9.82215 |
| 2010 | 9.9632 |
| 2009 | 10.0888 |
| 2008 | 10.235 |
| 2007 | 10.3772 |
| 2006 | 10.4609 |
| 2005 | 10.5236 |
| 2004 | 10.571 |
| 2003 | 10.5333 |
| 2002 | 10.4324 |
| 2001 | 10.2884 |
| 2000 | 10.0863 |
| 1999 | 9.8616 |
| 1998 | 9.60761 |
| 1997 | 9.31691 |
| 1996 | 9.04362 |
| 1995 | 8.8206 |
| 1994 | 8.61352 |
| 1993 | 8.42207 |
| 1992 | 8.26637 |
| 1991 | 8.1864 |
| 1990 | 8.16355 |
| 1989 | 8.17949 |
| 1988 | 8.26767 |
| 1987 | 8.42661 |
| 1986 | 8.63621 |
| 1985 | 8.87008 |
| 1984 | 9.09943 |
| 1983 | 9.23923 |
| 1982 | 9.26075 |
| 1981 | 9.21374 |
| 1980 | 9.10137 |
| 1979 | 8.94147 |
| 1978 | 8.74892 |
| 1977 | 8.52685 |
| 1976 | 8.29947 |
| 1975 | 8.08738 |
| 1974 | 7.95382 |
| 1973 | 7.8836 |
| 1972 | 7.79878 |
| 1971 | 7.72903 |
| 1970 | 7.70417 |
| 1969 | 7.62531 |
| 1968 | 7.49672 |
| 1967 | 7.45181 |
| 1966 | 7.47087 |
| 1965 | 7.49595 |
| 1964 | 7.53945 |
| 1963 | 7.6266 |
| 1962 | 7.73276 |
| 1961 | 7.85588 |
| 1960 | 8.0657 |