| 年份 | 加纳 |
|---|---|
| 2023 | - |
| 2022 | 2.07226 |
| 2021 | 2.05713 |
| 2020 | 2.03096 |
| 2019 | 1.99082 |
| 2018 | 1.93963 |
| 2017 | 1.88327 |
| 2016 | 1.8246 |
| 2015 | 1.76554 |
| 2014 | 1.72029 |
| 2013 | 1.68747 |
| 2012 | 1.65102 |
| 2011 | 1.61603 |
| 2010 | 1.59054 |
| 2009 | 1.55711 |
| 2008 | 1.51841 |
| 2007 | 1.50249 |
| 2006 | 1.50314 |
| 2005 | 1.50648 |
| 2004 | 1.51474 |
| 2003 | 1.53264 |
| 2002 | 1.55366 |
| 2001 | 1.57688 |
| 2000 | 1.60696 |
| 1999 | 1.64302 |
| 1998 | 1.67968 |
| 1997 | 1.71248 |
| 1996 | 1.74018 |
| 1995 | 1.75958 |
| 1994 | 1.76473 |
| 1993 | 1.75784 |
| 1992 | 1.74835 |
| 1991 | 1.73652 |
| 1990 | 1.72374 |
| 1989 | 1.71355 |
| 1988 | 1.70013 |
| 1987 | 1.68351 |
| 1986 | 1.67036 |
| 1985 | 1.66045 |
| 1984 | 1.64904 |
| 1983 | 1.63583 |
| 1982 | 1.61887 |
| 1981 | 1.60308 |
| 1980 | 1.59611 |
| 1979 | 1.58349 |
| 1978 | 1.56167 |
| 1977 | 1.54143 |
| 1976 | 1.52142 |
| 1975 | 1.50408 |
| 1974 | 1.4928 |
| 1973 | 1.48652 |
| 1972 | 1.48894 |
| 1971 | 1.50033 |
| 1970 | 1.50517 |
| 1969 | 1.50069 |
| 1968 | 1.49866 |
| 1967 | 1.4967 |
| 1966 | 1.49335 |
| 1965 | 1.49574 |
| 1964 | 1.50678 |
| 1963 | 1.52084 |
| 1962 | 1.5307 |
| 1961 | 1.53571 |
| 1960 | 1.54398 |