| 年份 | 纳米比亚 |
|---|---|
| 2023 | - |
| 2022 | 3.49231 |
| 2021 | 3.48679 |
| 2020 | 3.45834 |
| 2019 | 3.40374 |
| 2018 | 3.32966 |
| 2017 | 3.2468 |
| 2016 | 3.15618 |
| 2015 | 3.06112 |
| 2014 | 2.96623 |
| 2013 | 2.87632 |
| 2012 | 2.79573 |
| 2011 | 2.72787 |
| 2010 | 2.67303 |
| 2009 | 2.62895 |
| 2008 | 2.59316 |
| 2007 | 2.56258 |
| 2006 | 2.5359 |
| 2005 | 2.51341 |
| 2004 | 2.49384 |
| 2003 | 2.47671 |
| 2002 | 2.479 |
| 2001 | 2.50645 |
| 2000 | 2.53984 |
| 1999 | 2.57082 |
| 1998 | 2.59608 |
| 1997 | 2.59984 |
| 1996 | 2.57558 |
| 1995 | 2.53525 |
| 1994 | 2.48733 |
| 1993 | 2.43533 |
| 1992 | 2.38245 |
| 1991 | 2.33251 |
| 1990 | 2.28715 |
| 1989 | 2.23291 |
| 1988 | 2.18248 |
| 1987 | 2.16034 |
| 1986 | 2.1552 |
| 1985 | 2.16829 |
| 1984 | 2.2027 |
| 1983 | 2.25994 |
| 1982 | 2.33385 |
| 1981 | 2.41501 |
| 1980 | 2.49065 |
| 1979 | 2.55294 |
| 1978 | 2.60219 |
| 1977 | 2.63819 |
| 1976 | 2.67111 |
| 1975 | 2.71027 |
| 1974 | 2.75118 |
| 1973 | 2.79034 |
| 1972 | 2.82982 |
| 1971 | 2.86942 |
| 1970 | 2.9075 |
| 1969 | 2.94457 |
| 1968 | 2.98375 |
| 1967 | 3.02425 |
| 1966 | 3.06275 |
| 1965 | 3.09772 |
| 1964 | 3.1299 |
| 1963 | 3.1587 |
| 1962 | 3.18631 |
| 1961 | 3.21785 |
| 1960 | 3.25548 |