| 年份 | 加纳 |
|---|---|
| 2023 | - |
| 2022 | 0.577438 |
| 2021 | 0.588516 |
| 2020 | 0.602697 |
| 2019 | 0.618127 |
| 2018 | 0.635184 |
| 2017 | 0.64873 |
| 2016 | 0.657704 |
| 2015 | 0.666622 |
| 2014 | 0.675795 |
| 2013 | 0.682338 |
| 2012 | 0.68491 |
| 2011 | 0.684334 |
| 2010 | 0.681169 |
| 2009 | 0.672852 |
| 2008 | 0.660316 |
| 2007 | 0.648025 |
| 2006 | 0.636146 |
| 2005 | 0.624169 |
| 2004 | 0.612831 |
| 2003 | 0.599306 |
| 2002 | 0.582906 |
| 2001 | 0.566768 |
| 2000 | 0.549957 |
| 1999 | 0.531187 |
| 1998 | 0.513254 |
| 1997 | 0.495351 |
| 1996 | 0.475937 |
| 1995 | 0.457748 |
| 1994 | 0.442169 |
| 1993 | 0.429611 |
| 1992 | 0.419781 |
| 1991 | 0.409741 |
| 1990 | 0.399329 |
| 1989 | 0.391238 |
| 1988 | 0.38589 |
| 1987 | 0.383733 |
| 1986 | 0.383279 |
| 1985 | 0.381585 |
| 1984 | 0.379644 |
| 1983 | 0.38397 |
| 1982 | 0.39321 |
| 1981 | 0.415127 |
| 1980 | 0.459117 |
| 1979 | 0.484807 |
| 1978 | 0.483623 |
| 1977 | 0.485334 |
| 1976 | 0.49165 |
| 1975 | 0.503596 |
| 1974 | 0.519041 |
| 1973 | 0.53725 |
| 1972 | 0.562167 |
| 1971 | 0.596871 |
| 1970 | 0.626733 |
| 1969 | 0.64202 |
| 1968 | 0.650441 |
| 1967 | 0.655567 |
| 1966 | 0.659168 |
| 1965 | 0.658088 |
| 1964 | 0.649191 |
| 1963 | 0.632259 |
| 1962 | 0.607709 |
| 1961 | 0.575737 |
| 1960 | 0.571247 |