| 年份 | 加纳 |
|---|---|
| 2023 | - |
| 2022 | 0.896047 |
| 2021 | 0.878814 |
| 2020 | 0.866611 |
| 2019 | 0.845915 |
| 2018 | 0.819365 |
| 2017 | 0.805674 |
| 2016 | 0.801631 |
| 2015 | 0.799935 |
| 2014 | 0.800918 |
| 2013 | 0.807191 |
| 2012 | 0.815348 |
| 2011 | 0.824392 |
| 2010 | 0.836979 |
| 2009 | 0.853049 |
| 2008 | 0.869714 |
| 2007 | 0.884923 |
| 2006 | 0.898307 |
| 2005 | 0.908064 |
| 2004 | 0.910547 |
| 2003 | 0.906167 |
| 2002 | 0.899941 |
| 2001 | 0.892396 |
| 2000 | 0.883053 |
| 1999 | 0.873269 |
| 1998 | 0.861127 |
| 1997 | 0.847037 |
| 1996 | 0.83424 |
| 1995 | 0.822611 |
| 1994 | 0.810678 |
| 1993 | 0.797784 |
| 1992 | 0.782547 |
| 1991 | 0.764993 |
| 1990 | 0.747885 |
| 1989 | 0.732095 |
| 1988 | 0.717503 |
| 1987 | 0.704289 |
| 1986 | 0.690341 |
| 1985 | 0.676577 |
| 1984 | 0.665366 |
| 1983 | 0.659641 |
| 1982 | 0.661272 |
| 1981 | 0.680541 |
| 1980 | 0.719484 |
| 1979 | 0.73503 |
| 1978 | 0.723399 |
| 1977 | 0.71448 |
| 1976 | 0.710759 |
| 1975 | 0.717128 |
| 1974 | 0.734419 |
| 1973 | 0.760791 |
| 1972 | 0.795321 |
| 1971 | 0.84207 |
| 1970 | 0.883941 |
| 1969 | 0.902071 |
| 1968 | 0.905597 |
| 1967 | 0.906054 |
| 1966 | 0.905898 |
| 1965 | 0.903591 |
| 1964 | 0.901111 |
| 1963 | 0.89663 |
| 1962 | 0.88614 |
| 1961 | 0.868164 |
| 1960 | 0.876637 |