| 年份 | 加纳 |
|---|---|
| 2023 | - |
| 2022 | 4.43002 |
| 2021 | 4.26147 |
| 2020 | 4.11138 |
| 2019 | 3.96557 |
| 2018 | 3.82772 |
| 2017 | 3.70709 |
| 2016 | 3.62033 |
| 2015 | 3.56306 |
| 2014 | 3.52543 |
| 2013 | 3.51699 |
| 2012 | 3.53428 |
| 2011 | 3.56684 |
| 2010 | 3.60472 |
| 2009 | 3.63766 |
| 2008 | 3.65729 |
| 2007 | 3.65991 |
| 2006 | 3.64515 |
| 2005 | 3.61139 |
| 2004 | 3.55787 |
| 2003 | 3.48785 |
| 2002 | 3.40714 |
| 2001 | 3.31839 |
| 2000 | 3.22491 |
| 1999 | 3.15611 |
| 1998 | 3.10747 |
| 1997 | 3.04738 |
| 1996 | 2.98896 |
| 1995 | 2.95041 |
| 1994 | 2.90032 |
| 1993 | 2.84262 |
| 1992 | 2.82721 |
| 1991 | 2.8433 |
| 1990 | 2.86448 |
| 1989 | 2.89452 |
| 1988 | 2.94437 |
| 1987 | 3.00224 |
| 1986 | 3.06544 |
| 1985 | 3.14301 |
| 1984 | 3.23431 |
| 1983 | 3.34413 |
| 1982 | 3.45583 |
| 1981 | 3.54247 |
| 1980 | 3.60636 |
| 1979 | 3.64794 |
| 1978 | 3.66676 |
| 1977 | 3.67189 |
| 1976 | 3.64671 |
| 1975 | 3.59803 |
| 1974 | 3.55249 |
| 1973 | 3.50086 |
| 1972 | 3.44576 |
| 1971 | 3.39568 |
| 1970 | 3.37166 |
| 1969 | 3.3864 |
| 1968 | 3.41988 |
| 1967 | 3.45036 |
| 1966 | 3.47386 |
| 1965 | 3.49663 |
| 1964 | 3.51954 |
| 1963 | 3.54346 |
| 1962 | 3.56557 |
| 1961 | 3.57945 |
| 1960 | 3.55251 |