| 年份 | 加纳 |
|---|---|
| 2023 | - |
| 2022 | 2.50446 |
| 2021 | 2.51739 |
| 2020 | 2.53526 |
| 2019 | 2.54874 |
| 2018 | 2.55207 |
| 2017 | 2.54356 |
| 2016 | 2.52391 |
| 2015 | 2.49302 |
| 2014 | 2.44966 |
| 2013 | 2.39623 |
| 2012 | 2.33638 |
| 2011 | 2.27117 |
| 2010 | 2.20205 |
| 2009 | 2.14934 |
| 2008 | 2.11118 |
| 2007 | 2.06679 |
| 2006 | 2.02404 |
| 2005 | 1.99445 |
| 2004 | 1.956 |
| 2003 | 1.91118 |
| 2002 | 1.89505 |
| 2001 | 1.89979 |
| 2000 | 1.90717 |
| 1999 | 1.91907 |
| 1998 | 1.94202 |
| 1997 | 1.96793 |
| 1996 | 1.99552 |
| 1995 | 2.03231 |
| 1994 | 2.07891 |
| 1993 | 2.12833 |
| 1992 | 2.17428 |
| 1991 | 2.21549 |
| 1990 | 2.2478 |
| 1989 | 2.26221 |
| 1988 | 2.26154 |
| 1987 | 2.25757 |
| 1986 | 2.25038 |
| 1985 | 2.24088 |
| 1984 | 2.23291 |
| 1983 | 2.21353 |
| 1982 | 2.18538 |
| 1981 | 2.16733 |
| 1980 | 2.15626 |
| 1979 | 2.14718 |
| 1978 | 2.13725 |
| 1977 | 2.11836 |
| 1976 | 2.09969 |
| 1975 | 2.08562 |
| 1974 | 2.06748 |
| 1973 | 2.04713 |
| 1972 | 2.02643 |
| 1971 | 2.00671 |
| 1970 | 1.99064 |
| 1969 | 1.9796 |
| 1968 | 1.97166 |
| 1967 | 1.9691 |
| 1966 | 1.97144 |
| 1965 | 1.96615 |
| 1964 | 1.95591 |
| 1963 | 1.95297 |
| 1962 | 1.95143 |
| 1961 | 1.94793 |
| 1960 | 1.94952 |