| 年份 | 赞比亚 |
|---|---|
| 2023 | - |
| 2022 | - |
| 2021 | 24.6 |
| 2020 | 25 |
| 2019 | 25.4 |
| 2018 | 25.7 |
| 2017 | 25.9 |
| 2016 | 26.1 |
| 2015 | 26.2 |
| 2014 | 26.3 |
| 2013 | 26.4 |
| 2012 | 26.6 |
| 2011 | 26.7 |
| 2010 | 26.9 |
| 2009 | 27.1 |
| 2008 | 27.3 |
| 2007 | 27.6 |
| 2006 | 28.1 |
| 2005 | 28.9 |
| 2004 | 30.1 |
| 2003 | 31.5 |
| 2002 | 32.9 |
| 2001 | 34.3 |
| 2000 | 35.3 |
| 1999 | 35.8 |
| 1998 | 36 |
| 1997 | 36 |
| 1996 | 35.9 |
| 1995 | 35.7 |
| 1994 | 35.6 |
| 1993 | 35.7 |
| 1992 | 35.9 |
| 1991 | 36.2 |
| 1990 | 36.5 |
| 1989 | 36.8 |
| 1988 | 37 |
| 1987 | 36.9 |
| 1986 | 36.6 |
| 1985 | 36.3 |
| 1984 | 35.9 |
| 1983 | 35.5 |
| 1982 | 35.2 |
| 1981 | 34.9 |
| 1980 | 34.7 |
| 1979 | 34.5 |
| 1978 | 34.3 |
| 1977 | 34.1 |
| 1976 | 34 |
| 1975 | 34 |
| 1974 | 34.2 |
| 1973 | 34.5 |
| 1972 | 34.9 |
| 1971 | 35.4 |
| 1970 | 35.9 |
| 1969 | 36.2 |
| 1968 | - |
| 1967 | - |
| 1966 | - |
| 1965 | - |
| 1964 | - |
| 1963 | - |
| 1962 | - |
| 1961 | - |
| 1960 | - |