| 年份 | 加纳 |
|---|---|
| 2023 | - |
| 2022 | 6.77062 |
| 2021 | 6.78309 |
| 2020 | 6.77496 |
| 2019 | 6.75375 |
| 2018 | 6.6847 |
| 2017 | 6.57979 |
| 2016 | 6.45619 |
| 2015 | 6.30743 |
| 2014 | 6.15106 |
| 2013 | 5.98738 |
| 2012 | 5.81601 |
| 2011 | 5.6615 |
| 2010 | 5.53769 |
| 2009 | 5.42747 |
| 2008 | 5.33495 |
| 2007 | 5.27503 |
| 2006 | 5.26548 |
| 2005 | 5.29771 |
| 2004 | 5.35655 |
| 2003 | 5.44888 |
| 2002 | 5.56519 |
| 2001 | 5.686 |
| 2000 | 5.79557 |
| 1999 | 5.87413 |
| 1998 | 5.90463 |
| 1997 | 5.88248 |
| 1996 | 5.81208 |
| 1995 | 5.69804 |
| 1994 | 5.54821 |
| 1993 | 5.37782 |
| 1992 | 5.20005 |
| 1991 | 5.02375 |
| 1990 | 4.85712 |
| 1989 | 4.69875 |
| 1988 | 4.54417 |
| 1987 | 4.39166 |
| 1986 | 4.25296 |
| 1985 | 4.14599 |
| 1984 | 4.07566 |
| 1983 | 4.13396 |
| 1982 | 4.32547 |
| 1981 | 4.52445 |
| 1980 | 4.72726 |
| 1979 | 4.97641 |
| 1978 | 5.24782 |
| 1977 | 5.48678 |
| 1976 | 5.60035 |
| 1975 | 5.63488 |
| 1974 | 5.70009 |
| 1973 | 5.75109 |
| 1972 | 5.75357 |
| 1971 | 5.68293 |
| 1970 | 5.60806 |
| 1969 | 5.57232 |
| 1968 | 5.53724 |
| 1967 | 5.50925 |
| 1966 | 5.48202 |
| 1965 | 5.45335 |
| 1964 | 5.43024 |
| 1963 | 5.41129 |
| 1962 | 5.40695 |
| 1961 | 5.43659 |
| 1960 | 5.4198 |