| 年份 | 加纳 |
|---|---|
| 2023 | - |
| 2022 | 3.01961 |
| 2021 | 3.11064 |
| 2020 | 3.19204 |
| 2019 | 3.23644 |
| 2018 | 3.29434 |
| 2017 | 3.42963 |
| 2016 | 3.55775 |
| 2015 | 3.60516 |
| 2014 | 3.6717 |
| 2013 | 3.74036 |
| 2012 | 3.77311 |
| 2011 | 3.7721 |
| 2010 | 3.82394 |
| 2009 | 3.90399 |
| 2008 | 3.9639 |
| 2007 | 4.0146 |
| 2006 | 4.06631 |
| 2005 | 4.10343 |
| 2004 | 4.13576 |
| 2003 | 4.1965 |
| 2002 | 4.24825 |
| 2001 | 4.17793 |
| 2000 | 4.22698 |
| 1999 | 4.22882 |
| 1998 | 4.23321 |
| 1997 | 4.18503 |
| 1996 | 4.16249 |
| 1995 | 4.19496 |
| 1994 | 4.27062 |
| 1993 | 4.37636 |
| 1992 | 4.43963 |
| 1991 | 4.51512 |
| 1990 | 4.58848 |
| 1989 | 4.58421 |
| 1988 | 4.54263 |
| 1987 | 4.46642 |
| 1986 | 4.40944 |
| 1985 | 4.39969 |
| 1984 | 3.86854 |
| 1983 | 3.84104 |
| 1982 | 3.71803 |
| 1981 | 3.60781 |
| 1980 | 3.71507 |
| 1979 | 3.83507 |
| 1978 | 3.79754 |
| 1977 | 3.69787 |
| 1976 | 3.62076 |
| 1975 | 3.62511 |
| 1974 | 3.61886 |
| 1973 | 3.59388 |
| 1972 | 3.52762 |
| 1971 | 3.49201 |
| 1970 | 4.34232 |
| 1969 | 4.66019 |
| 1968 | 4.6288 |
| 1967 | 4.63842 |
| 1966 | 4.6568 |
| 1965 | 4.67111 |
| 1964 | 4.68412 |
| 1963 | 4.68811 |
| 1962 | 4.69832 |
| 1961 | 5.13463 |
| 1960 | - |