| 年份 | 加纳 |
|---|---|
| 2023 | - |
| 2022 | 3.40682 |
| 2021 | 3.38339 |
| 2020 | 3.38541 |
| 2019 | 3.4043 |
| 2018 | 3.44506 |
| 2017 | 3.50002 |
| 2016 | 3.55895 |
| 2015 | 3.61205 |
| 2014 | 3.64628 |
| 2013 | 3.65371 |
| 2012 | 3.63176 |
| 2011 | 3.58056 |
| 2010 | 3.50083 |
| 2009 | 3.39775 |
| 2008 | 3.27991 |
| 2007 | 3.15563 |
| 2006 | 3.0315 |
| 2005 | 2.9139 |
| 2004 | 2.80171 |
| 2003 | 2.68954 |
| 2002 | 2.57564 |
| 2001 | 2.46704 |
| 2000 | 2.3756 |
| 1999 | 2.30537 |
| 1998 | 2.26908 |
| 1997 | 2.28711 |
| 1996 | 2.34891 |
| 1995 | 2.42508 |
| 1994 | 2.51303 |
| 1993 | 2.61143 |
| 1992 | 2.69778 |
| 1991 | 2.76709 |
| 1990 | 2.83327 |
| 1989 | 2.90002 |
| 1988 | 2.95557 |
| 1987 | 2.99166 |
| 1986 | 3.01243 |
| 1985 | 3.0188 |
| 1984 | 3.00272 |
| 1983 | 2.97065 |
| 1982 | 2.93336 |
| 1981 | 2.88424 |
| 1980 | 2.82339 |
| 1979 | 2.75815 |
| 1978 | 2.68506 |
| 1977 | 2.60856 |
| 1976 | 2.54336 |
| 1975 | 2.49743 |
| 1974 | 2.47048 |
| 1973 | 2.45338 |
| 1972 | 2.4323 |
| 1971 | 2.4032 |
| 1970 | 2.37384 |
| 1969 | 2.34825 |
| 1968 | 2.32632 |
| 1967 | 2.30391 |
| 1966 | 2.27539 |
| 1965 | 2.24898 |
| 1964 | 2.23266 |
| 1963 | 2.22339 |
| 1962 | 2.22374 |
| 1961 | 2.23186 |
| 1960 | 2.22312 |