| 年份 | 加纳 |
|---|---|
| 2023 | - |
| 2022 | 5.88252 |
| 2021 | 5.77173 |
| 2020 | 5.62654 |
| 2019 | 5.46639 |
| 2018 | 5.29341 |
| 2017 | 5.10234 |
| 2016 | 4.91943 |
| 2015 | 4.76149 |
| 2014 | 4.60873 |
| 2013 | 4.46284 |
| 2012 | 4.33722 |
| 2011 | 4.24837 |
| 2010 | 4.188 |
| 2009 | 4.14686 |
| 2008 | 4.13778 |
| 2007 | 4.15781 |
| 2006 | 4.19725 |
| 2005 | 4.2465 |
| 2004 | 4.29122 |
| 2003 | 4.32011 |
| 2002 | 4.32918 |
| 2001 | 4.31679 |
| 2000 | 4.28163 |
| 1999 | 4.22361 |
| 1998 | 4.14509 |
| 1997 | 4.05162 |
| 1996 | 3.94931 |
| 1995 | 3.84404 |
| 1994 | 3.77051 |
| 1993 | 3.72318 |
| 1992 | 3.66422 |
| 1991 | 3.6091 |
| 1990 | 3.5765 |
| 1989 | 3.52895 |
| 1988 | 3.47402 |
| 1987 | 3.47249 |
| 1986 | 3.51017 |
| 1985 | 3.55459 |
| 1984 | 3.60886 |
| 1983 | 3.69629 |
| 1982 | 3.79548 |
| 1981 | 3.88127 |
| 1980 | 3.97644 |
| 1979 | 4.09874 |
| 1978 | 4.23181 |
| 1977 | 4.35452 |
| 1976 | 4.44346 |
| 1975 | 4.49574 |
| 1974 | 4.51854 |
| 1973 | 4.50997 |
| 1972 | 4.48455 |
| 1971 | 4.4338 |
| 1970 | 4.38216 |
| 1969 | 4.36145 |
| 1968 | 4.35443 |
| 1967 | 4.35406 |
| 1966 | 4.37359 |
| 1965 | 4.4176 |
| 1964 | 4.4806 |
| 1963 | 4.55431 |
| 1962 | 4.62492 |
| 1961 | 4.6892 |
| 1960 | 4.70066 |