| 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 | - |