| 年份 | 加纳 |
|---|---|
| 2023 | - |
| 2022 | 0.350071 |
| 2021 | 0.384879 |
| 2020 | 0.350949 |
| 2019 | 0.343818 |
| 2018 | 0.325877 |
| 2017 | 0.312701 |
| 2016 | 0.291412 |
| 2015 | 0.392914 |
| 2014 | 0.484989 |
| 2013 | 0.400293 |
| 2012 | 0.593209 |
| 2011 | 0.435155 |
| 2010 | 0.282688 |
| 2009 | 0.336758 |
| 2008 | 0.294033 |
| 2007 | 0.370333 |
| 2006 | 0.262214 |
| 2005 | 0.260967 |
| 2004 | 0.277571 |
| 2003 | 0.303758 |
| 2002 | 0.260306 |
| 2001 | 0.264453 |
| 2000 | 0.44363 |
| 1999 | 0.333671 |
| 1998 | 0.334708 |
| 1997 | 0.287938 |
| 1996 | 0.286904 |
| 1995 | 0.335748 |
| 1994 | 0.426587 |
| 1993 | 0.421952 |
| 1992 | 0.377347 |
| 1991 | 0.368975 |
| 1990 | 0.27651 |
| 1989 | 0.430847 |
| 1988 | 0.437881 |
| 1987 | 0.892627 |
| 1986 | 0.900517 |
| 1985 | 1.00044 |
| 1984 | 0.593212 |
| 1983 | 0.34118 |
| 1982 | 0.541347 |
| 1981 | 0.741114 |
| 1980 | 0.773575 |
| 1979 | 0.646304 |
| 1978 | 0.851282 |
| 1977 | 1.25325 |
| 1976 | 1.56681 |
| 1975 | 1.71493 |
| 1974 | 1.58155 |
| 1973 | 1.36493 |
| 1972 | 1.42984 |
| 1971 | 1.70132 |
| 1970 | 2.11819 |
| 1969 | 2.50125 |
| 1968 | 2.65588 |
| 1967 | - |
| 1966 | 2.22661 |
| 1965 | 1.73261 |
| 1964 | 1.92199 |
| 1963 | 2.01635 |
| 1962 | 2.001 |
| 1961 | 2.103 |
| 1960 | 1.70666 |