| 年份 | 加纳 |
|---|---|
| 2023 | - |
| 2022 | 6.69738 |
| 2021 | 8.00565 |
| 2020 | 7.83341 |
| 2019 | 7.0432 |
| 2018 | 7.10478 |
| 2017 | 6.95705 |
| 2016 | 7.88693 |
| 2015 | 7.68049 |
| 2014 | 8.26779 |
| 2013 | 8.78317 |
| 2012 | 11.7643 |
| 2011 | 13.7886 |
| 2010 | 7.0695 |
| 2009 | 7.57424 |
| 2008 | 8.73166 |
| 2007 | 8.52494 |
| 2006 | 8.68201 |
| 2005 | 15.3082 |
| 2004 | 12.1728 |
| 2003 | 11.5332 |
| 2002 | 9.87277 |
| 2001 | 9.72236 |
| 2000 | 10.1716 |
| 1999 | 10.8433 |
| 1998 | 10.3242 |
| 1997 | 12.3556 |
| 1996 | 12.0437 |
| 1995 | 12.0735 |
| 1994 | 13.7233 |
| 1993 | 14.4494 |
| 1992 | 12.1076 |
| 1991 | 9.48314 |
| 1990 | 9.31153 |
| 1989 | 9.84481 |
| 1988 | 9.70799 |
| 1987 | 10.6343 |
| 1986 | 11.067 |
| 1985 | 9.39839 |
| 1984 | 7.25936 |
| 1983 | 5.86129 |
| 1982 | 6.48113 |
| 1981 | 8.79024 |
| 1980 | 11.164 |
| 1979 | 10.2863 |
| 1978 | 11.298 |
| 1977 | 12.6221 |
| 1976 | 12.2433 |
| 1975 | 13.0229 |
| 1974 | 12.2103 |
| 1973 | 10.9112 |
| 1972 | 12.611 |
| 1971 | 12.96 |
| 1970 | 12.8375 |
| 1969 | 14.2429 |
| 1968 | 16.7647 |
| 1967 | 14.9601 |
| 1966 | 13.0435 |
| 1965 | 14.4611 |
| 1964 | 11.7314 |
| 1963 | 11.3636 |
| 1962 | 10.3343 |
| 1961 | 10.8602 |
| 1960 | 10.0115 |