| 年份 | 加纳 |
|---|---|
| 2023 | - |
| 2022 | - |
| 2021 | 0.37136 |
| 2020 | 0.198012 |
| 2019 | 0.165146 |
| 2018 | 0.113151 |
| 2017 | 0.0717218 |
| 2016 | 0.0451267 |
| 2015 | 0.0841914 |
| 2014 | 7.87671E-6 |
| 2013 | 7.10419E-6 |
| 2012 | 1.16573E-5 |
| 2011 | 1.57191E-5 |
| 2010 | 1.95889E-5 |
| 2009 | 3.6408E-5 |
| 2008 | 5.8134E-5 |
| 2007 | 7.9274E-5 |
| 2006 | 0.00014528 |
| 2005 | 0.000143121 |
| 2004 | 0.000475023 |
| 2003 | 0.000787539 |
| 2002 | 0.00131058 |
| 2001 | 0.00241005 |
| 2000 | 0.00340464 |
| 1999 | 0.00184084 |
| 1998 | 0.00244792 |
| 1997 | 0.00549941 |
| 1996 | 0.00825868 |
| 1995 | 0.00989214 |
| 1994 | 0.0118627 |
| 1993 | 0.0120597 |
| 1992 | 0.0105191 |
| 1991 | 0.0130703 |
| 1990 | 0.0198569 |
| 1989 | 0.0214761 |
| 1988 | 0.0216247 |
| 1987 | 0.0290862 |
| 1986 | 0.0284412 |
| 1985 | 0.0259642 |
| 1984 | 0.0230031 |
| 1983 | 0.0215966 |
| 1982 | 0.00583606 |
| 1981 | 0.0120972 |
| 1980 | 0.0141202 |
| 1979 | 0.00668587 |
| 1978 | 0.000761892 |
| 1977 | - |
| 1976 | - |
| 1975 | - |
| 1974 | - |
| 1973 | - |
| 1972 | - |
| 1971 | - |
| 1970 | - |
| 1969 | - |
| 1968 | - |
| 1967 | - |
| 1966 | - |
| 1965 | - |
| 1964 | - |
| 1963 | - |
| 1962 | - |
| 1961 | - |
| 1960 | - |