| 年份 | 纳米比亚 |
|---|---|
| 2023 | - |
| 2022 | 6.63822 |
| 2021 | 6.73979 |
| 2020 | 6.74768 |
| 2019 | 6.64884 |
| 2018 | 6.5232 |
| 2017 | 6.40129 |
| 2016 | 6.28447 |
| 2015 | 6.17428 |
| 2014 | 6.07252 |
| 2013 | 5.98341 |
| 2012 | 5.8997 |
| 2011 | 5.81429 |
| 2010 | 5.73598 |
| 2009 | 5.67339 |
| 2008 | 5.62856 |
| 2007 | 5.59965 |
| 2006 | 5.58674 |
| 2005 | 5.58798 |
| 2004 | 5.59358 |
| 2003 | 5.60007 |
| 2002 | 5.61786 |
| 2001 | 5.64728 |
| 2000 | 5.68204 |
| 1999 | 5.7226 |
| 1998 | 5.77064 |
| 1997 | 5.82181 |
| 1996 | 5.87711 |
| 1995 | 5.93982 |
| 1994 | 6.00481 |
| 1993 | 6.06957 |
| 1992 | 6.13435 |
| 1991 | 6.20127 |
| 1990 | 6.28859 |
| 1989 | 6.68997 |
| 1988 | 7.21053 |
| 1987 | 7.43868 |
| 1986 | 7.63703 |
| 1985 | 7.81997 |
| 1984 | 7.97506 |
| 1983 | 8.10984 |
| 1982 | 8.2308 |
| 1981 | 8.20289 |
| 1980 | 8.05363 |
| 1979 | 7.99537 |
| 1978 | 7.86937 |
| 1977 | 7.73979 |
| 1976 | 7.73206 |
| 1975 | 7.74557 |
| 1974 | 7.79191 |
| 1973 | 7.83843 |
| 1972 | 7.88978 |
| 1971 | 7.94244 |
| 1970 | 7.98553 |
| 1969 | 8.02029 |
| 1968 | 8.04018 |
| 1967 | 8.04743 |
| 1966 | 8.05193 |
| 1965 | 8.05638 |
| 1964 | 8.05969 |
| 1963 | 8.05458 |
| 1962 | 8.04744 |
| 1961 | 8.04632 |
| 1960 | 8.04649 |