| 年份 | 加纳 |
|---|---|
| 2023 | - |
| 2022 | 1.02553 |
| 2021 | 0.977749 |
| 2020 | 0.935884 |
| 2019 | 0.899902 |
| 2018 | 0.876277 |
| 2017 | 0.874264 |
| 2016 | 0.889749 |
| 2015 | 0.911983 |
| 2014 | 0.939157 |
| 2013 | 0.970419 |
| 2012 | 0.996859 |
| 2011 | 1.01637 |
| 2010 | 1.03499 |
| 2009 | 1.05362 |
| 2008 | 1.06798 |
| 2007 | 1.07567 |
| 2006 | 1.07833 |
| 2005 | 1.07636 |
| 2004 | 1.06646 |
| 2003 | 1.04982 |
| 2002 | 1.03338 |
| 2001 | 1.01814 |
| 2000 | 1.0016 |
| 1999 | 0.983764 |
| 1998 | 0.961246 |
| 1997 | 0.933973 |
| 1996 | 0.906737 |
| 1995 | 0.879618 |
| 1994 | 0.851657 |
| 1993 | 0.825425 |
| 1992 | 0.798652 |
| 1991 | 0.769636 |
| 1990 | 0.74297 |
| 1989 | 0.71988 |
| 1988 | 0.700763 |
| 1987 | 0.686093 |
| 1986 | 0.67168 |
| 1985 | 0.657353 |
| 1984 | 0.647132 |
| 1983 | 0.646318 |
| 1982 | 0.655673 |
| 1981 | 0.679976 |
| 1980 | 0.721126 |
| 1979 | 0.741118 |
| 1978 | 0.736045 |
| 1977 | 0.733121 |
| 1976 | 0.732451 |
| 1975 | 0.73847 |
| 1974 | 0.753706 |
| 1973 | 0.77655 |
| 1972 | 0.805806 |
| 1971 | 0.844132 |
| 1970 | 0.877415 |
| 1969 | 0.887814 |
| 1968 | 0.88118 |
| 1967 | 0.868798 |
| 1966 | 0.854229 |
| 1965 | 0.837005 |
| 1964 | 0.82197 |
| 1963 | 0.809751 |
| 1962 | 0.795294 |
| 1961 | 0.776358 |
| 1960 | 0.784551 |