| 年份 | 加纳 |
|---|---|
| 2023 | - |
| 2022 | 13.1496 |
| 2021 | 13.338 |
| 2020 | 13.6015 |
| 2019 | 13.877 |
| 2018 | 14.1404 |
| 2017 | 14.4304 |
| 2016 | 14.6787 |
| 2015 | 14.8123 |
| 2014 | 14.8855 |
| 2013 | 14.9309 |
| 2012 | 14.9526 |
| 2011 | 14.9928 |
| 2010 | 15.0812 |
| 2009 | 15.1902 |
| 2008 | 15.3007 |
| 2007 | 15.4236 |
| 2006 | 15.5362 |
| 2005 | 15.6113 |
| 2004 | 15.659 |
| 2003 | 15.6821 |
| 2002 | 15.6703 |
| 2001 | 15.6462 |
| 2000 | 15.6389 |
| 1999 | 15.6901 |
| 1998 | 15.8389 |
| 1997 | 16.0823 |
| 1996 | 16.3835 |
| 1995 | 16.699 |
| 1994 | 17.0081 |
| 1993 | 17.3128 |
| 1992 | 17.6161 |
| 1991 | 17.9108 |
| 1990 | 18.1925 |
| 1989 | 18.4705 |
| 1988 | 18.8078 |
| 1987 | 19.1451 |
| 1986 | 19.3725 |
| 1985 | 19.55 |
| 1984 | 19.7123 |
| 1983 | 19.6474 |
| 1982 | 19.4458 |
| 1981 | 19.3015 |
| 1980 | 19.0883 |
| 1979 | 18.8446 |
| 1978 | 18.6232 |
| 1977 | 18.3973 |
| 1976 | 18.3621 |
| 1975 | 18.5058 |
| 1974 | 18.5893 |
| 1973 | 18.6463 |
| 1972 | 18.7359 |
| 1971 | 18.9551 |
| 1970 | 19.1732 |
| 1969 | 19.2753 |
| 1968 | 19.3745 |
| 1967 | 19.4979 |
| 1966 | 19.6294 |
| 1965 | 19.7383 |
| 1964 | 19.7912 |
| 1963 | 19.7653 |
| 1962 | 19.6635 |
| 1961 | 19.5022 |
| 1960 | 19.4025 |