| 年份 | 加纳 |
|---|---|
| 2023 | - |
| 2022 | 3.55489 |
| 2021 | 3.47676 |
| 2020 | 3.40551 |
| 2019 | 3.33205 |
| 2018 | 3.26225 |
| 2017 | 3.20619 |
| 2016 | 3.16441 |
| 2015 | 3.13823 |
| 2014 | 3.11872 |
| 2013 | 3.1086 |
| 2012 | 3.11833 |
| 2011 | 3.14067 |
| 2010 | 3.16641 |
| 2009 | 3.19337 |
| 2008 | 3.21952 |
| 2007 | 3.23802 |
| 2006 | 3.24846 |
| 2005 | 3.25654 |
| 2004 | 3.26118 |
| 2003 | 3.25596 |
| 2002 | 3.24204 |
| 2001 | 3.22264 |
| 2000 | 3.19358 |
| 1999 | 3.14949 |
| 1998 | 3.09306 |
| 1997 | 3.03285 |
| 1996 | 2.97064 |
| 1995 | 2.90787 |
| 1994 | 2.849 |
| 1993 | 2.79061 |
| 1992 | 2.72923 |
| 1991 | 2.66718 |
| 1990 | 2.60731 |
| 1989 | 2.55098 |
| 1988 | 2.50138 |
| 1987 | 2.45686 |
| 1986 | 2.41199 |
| 1985 | 2.37108 |
| 1984 | 2.34002 |
| 1983 | 2.33513 |
| 1982 | 2.35648 |
| 1981 | 2.43823 |
| 1980 | 2.6071 |
| 1979 | 2.69358 |
| 1978 | 2.6677 |
| 1977 | 2.65813 |
| 1976 | 2.67128 |
| 1975 | 2.70716 |
| 1974 | 2.76772 |
| 1973 | 2.85662 |
| 1972 | 2.97527 |
| 1971 | 3.13501 |
| 1970 | 3.27774 |
| 1969 | 3.34767 |
| 1968 | 3.37246 |
| 1967 | 3.37579 |
| 1966 | 3.36807 |
| 1965 | 3.34172 |
| 1964 | 3.28863 |
| 1963 | 3.20872 |
| 1962 | 3.10573 |
| 1961 | 2.97891 |
| 1960 | 2.95799 |