| 年份 | 加纳 |
|---|---|
| 2023 | - |
| 2022 | 8.74797 |
| 2021 | 8.64711 |
| 2020 | 8.56292 |
| 2019 | 8.53035 |
| 2018 | 8.56919 |
| 2017 | 8.66179 |
| 2016 | 8.79373 |
| 2015 | 8.95272 |
| 2014 | 9.11622 |
| 2013 | 9.27065 |
| 2012 | 9.41871 |
| 2011 | 9.56253 |
| 2010 | 9.69683 |
| 2009 | 9.81884 |
| 2008 | 9.9539 |
| 2007 | 10.0746 |
| 2006 | 10.1346 |
| 2005 | 10.1675 |
| 2004 | 10.1737 |
| 2003 | 10.0979 |
| 2002 | 9.9669 |
| 2001 | 9.8001 |
| 2000 | 9.5926 |
| 1999 | 9.37912 |
| 1998 | 9.15299 |
| 1997 | 8.91088 |
| 1996 | 8.69931 |
| 1995 | 8.54586 |
| 1994 | 8.4247 |
| 1993 | 8.34866 |
| 1992 | 8.33634 |
| 1991 | 8.40842 |
| 1990 | 8.54385 |
| 1989 | 8.7212 |
| 1988 | 8.96245 |
| 1987 | 9.25603 |
| 1986 | 9.57147 |
| 1985 | 9.8732 |
| 1984 | 10.1277 |
| 1983 | 10.1009 |
| 1982 | 9.83182 |
| 1981 | 9.59675 |
| 1980 | 9.31894 |
| 1979 | 8.96141 |
| 1978 | 8.59659 |
| 1977 | 8.25505 |
| 1976 | 8.10225 |
| 1975 | 8.1079 |
| 1974 | 8.07893 |
| 1973 | 8.03435 |
| 1972 | 7.98947 |
| 1971 | 8.00833 |
| 1970 | 8.00711 |
| 1969 | 7.89836 |
| 1968 | 7.7967 |
| 1967 | 7.80753 |
| 1966 | 7.9255 |
| 1965 | 8.07559 |
| 1964 | 8.2549 |
| 1963 | 8.46428 |
| 1962 | 8.65442 |
| 1961 | 8.8203 |
| 1960 | 9.12468 |