| 年份 | 加纳 |
|---|---|
| 2023 | - |
| 2022 | 3.17542 |
| 2021 | 3.09561 |
| 2020 | 3.03837 |
| 2019 | 2.99635 |
| 2018 | 2.97916 |
| 2017 | 2.98299 |
| 2016 | 3.00129 |
| 2015 | 3.02811 |
| 2014 | 3.05281 |
| 2013 | 3.0674 |
| 2012 | 3.06861 |
| 2011 | 3.05447 |
| 2010 | 3.02235 |
| 2009 | 2.97323 |
| 2008 | 2.91095 |
| 2007 | 2.83978 |
| 2006 | 2.76255 |
| 2005 | 2.68217 |
| 2004 | 2.62236 |
| 2003 | 2.57989 |
| 2002 | 2.52951 |
| 2001 | 2.4806 |
| 2000 | 2.4469 |
| 1999 | 2.40136 |
| 1998 | 2.34732 |
| 1997 | 2.32732 |
| 1996 | 2.33225 |
| 1995 | 2.3413 |
| 1994 | 2.35799 |
| 1993 | 2.39023 |
| 1992 | 2.42796 |
| 1991 | 2.46968 |
| 1990 | 2.52361 |
| 1989 | 2.58998 |
| 1988 | 2.66048 |
| 1987 | 2.72663 |
| 1986 | 2.78645 |
| 1985 | 2.83435 |
| 1984 | 2.85893 |
| 1983 | 2.87242 |
| 1982 | 2.88261 |
| 1981 | 2.87369 |
| 1980 | 2.85245 |
| 1979 | 2.83259 |
| 1978 | 2.80827 |
| 1977 | 2.77955 |
| 1976 | 2.75033 |
| 1975 | 2.72716 |
| 1974 | 2.7164 |
| 1973 | 2.70799 |
| 1972 | 2.69258 |
| 1971 | 2.66727 |
| 1970 | 2.64704 |
| 1969 | 2.64092 |
| 1968 | 2.6406 |
| 1967 | 2.6381 |
| 1966 | 2.62787 |
| 1965 | 2.61774 |
| 1964 | 2.61484 |
| 1963 | 2.6162 |
| 1962 | 2.62531 |
| 1961 | 2.64044 |
| 1960 | 2.62357 |