| 年份 | 加纳 |
|---|---|
| 2023 | - |
| 2022 | 1.93898 |
| 2021 | 2.00774 |
| 2020 | 2.06627 |
| 2019 | 2.08893 |
| 2018 | 2.12268 |
| 2017 | 2.23495 |
| 2016 | 2.33938 |
| 2015 | 2.36427 |
| 2014 | 2.40764 |
| 2013 | 2.45243 |
| 2012 | 2.4606 |
| 2011 | 2.43818 |
| 2010 | 2.47 |
| 2009 | 2.5355 |
| 2008 | 2.57233 |
| 2007 | 2.60546 |
| 2006 | 2.63916 |
| 2005 | 2.65989 |
| 2004 | 2.66891 |
| 2003 | 2.71443 |
| 2002 | 2.74838 |
| 2001 | 2.65977 |
| 2000 | 2.51652 |
| 1999 | 2.4391 |
| 1998 | 2.41567 |
| 1997 | 2.34852 |
| 1996 | 2.2966 |
| 1995 | 2.30882 |
| 1994 | 2.35859 |
| 1993 | 2.44551 |
| 1992 | 2.48152 |
| 1991 | 2.53438 |
| 1990 | 2.58731 |
| 1989 | 2.56217 |
| 1988 | 2.49051 |
| 1987 | 2.39812 |
| 1986 | 2.31873 |
| 1985 | 2.28918 |
| 1984 | 2.72255 |
| 1983 | 3.12242 |
| 1982 | 3.0006 |
| 1981 | 2.88841 |
| 1980 | 2.99045 |
| 1979 | 3.10838 |
| 1978 | 3.07212 |
| 1977 | 2.96715 |
| 1976 | 2.88799 |
| 1975 | 2.89028 |
| 1974 | 2.88197 |
| 1973 | 2.85493 |
| 1972 | 2.78314 |
| 1971 | 2.74889 |
| 1970 | 2.65329 |
| 1969 | 2.48374 |
| 1968 | 2.42964 |
| 1967 | 2.41982 |
| 1966 | 2.42237 |
| 1965 | 2.42488 |
| 1964 | 2.41034 |
| 1963 | 2.40253 |
| 1962 | 2.39289 |
| 1961 | 2.81775 |
| 1960 | - |