| 年份 | 纳米比亚 |
|---|---|
| 2023 | - |
| 2022 | - |
| 2021 | 0.316187 |
| 2020 | 0.321402 |
| 2019 | 0.326979 |
| 2018 | 0.332546 |
| 2017 | 0.338333 |
| 2016 | 0.34433 |
| 2015 | 0.350462 |
| 2014 | 0.356665 |
| 2013 | 0.362892 |
| 2012 | 0.369094 |
| 2011 | 0.375175 |
| 2010 | 0.381085 |
| 2009 | 0.386862 |
| 2008 | 0.392435 |
| 2007 | 0.397715 |
| 2006 | 0.409251 |
| 2005 | 0.4147 |
| 2004 | 0.420232 |
| 2003 | 0.425493 |
| 2002 | 0.432083 |
| 2001 | 0.43956 |
| 2000 | 0.448563 |
| 1999 | 0.458871 |
| 1998 | 0.470059 |
| 1997 | 0.481916 |
| 1996 | 0.494526 |
| 1995 | 0.508294 |
| 1994 | 0.479323 |
| 1993 | 0.462302 |
| 1992 | 0.451533 |
| 1991 | 0.466228 |
| 1990 | 0.4821 |
| 1989 | 0.512394 |
| 1988 | 0.546381 |
| 1987 | 0.566315 |
| 1986 | 0.585112 |
| 1985 | 0.603671 |
| 1984 | 0.621472 |
| 1983 | 0.638863 |
| 1982 | 0.651404 |
| 1981 | 0.663362 |
| 1980 | 0.671111 |
| 1979 | 0.684192 |
| 1978 | 0.695312 |
| 1977 | 0.70618 |
| 1976 | 0.725184 |
| 1975 | 0.743807 |
| 1974 | 0.766977 |
| 1973 | 0.790382 |
| 1972 | 0.814379 |
| 1971 | 0.83913 |
| 1970 | 0.861535 |
| 1969 | 0.884182 |
| 1968 | 0.909567 |
| 1967 | 0.93498 |
| 1966 | 0.955813 |
| 1965 | 0.980412 |
| 1964 | 1.00459 |
| 1963 | 1.02175 |
| 1962 | 1.0443 |
| 1961 | 1.0658 |
| 1960 | - |