| 年份 | 加纳 |
|---|---|
| 2023 | - |
| 2022 | 12.7062 |
| 2021 | 12.8935 |
| 2020 | 13.155 |
| 2019 | 13.4283 |
| 2018 | 13.6883 |
| 2017 | 13.9723 |
| 2016 | 14.2142 |
| 2015 | 14.3435 |
| 2014 | 14.4145 |
| 2013 | 14.4591 |
| 2012 | 14.4818 |
| 2011 | 14.5213 |
| 2010 | 14.604 |
| 2009 | 14.7045 |
| 2008 | 14.8032 |
| 2007 | 14.911 |
| 2006 | 15.0075 |
| 2005 | 15.0666 |
| 2004 | 15.101 |
| 2003 | 15.1134 |
| 2002 | 15.092 |
| 2001 | 15.056 |
| 2000 | 15.034 |
| 1999 | 15.0735 |
| 1998 | 15.2113 |
| 1997 | 15.4387 |
| 1996 | 15.7241 |
| 1995 | 16.0278 |
| 1994 | 16.3258 |
| 1993 | 16.606 |
| 1992 | 16.8755 |
| 1991 | 17.1426 |
| 1990 | 17.4006 |
| 1989 | 17.6584 |
| 1988 | 17.9592 |
| 1987 | 18.2387 |
| 1986 | 18.4043 |
| 1985 | 18.5101 |
| 1984 | 18.5794 |
| 1983 | 18.5402 |
| 1982 | 18.461 |
| 1981 | 18.3807 |
| 1980 | 18.2408 |
| 1979 | 18.1236 |
| 1978 | 18.052 |
| 1977 | 17.988 |
| 1976 | 18.0207 |
| 1975 | 18.1506 |
| 1974 | 18.2619 |
| 1973 | 18.3588 |
| 1972 | 18.4702 |
| 1971 | 18.6445 |
| 1970 | 18.825 |
| 1969 | 18.9628 |
| 1968 | 19.12 |
| 1967 | 19.3101 |
| 1966 | 19.5123 |
| 1965 | 19.6983 |
| 1964 | 19.8427 |
| 1963 | 19.9272 |
| 1962 | 19.9538 |
| 1961 | 19.9408 |
| 1960 | 19.9578 |