| 年份 | 赞比亚 |
|---|---|
| 2023 | - |
| 2022 | 4.00924 |
| 2021 | 4.09443 |
| 2020 | 4.18974 |
| 2019 | 4.26573 |
| 2018 | 4.32206 |
| 2017 | 4.37337 |
| 2016 | 4.40653 |
| 2015 | 4.4526 |
| 2014 | 4.50431 |
| 2013 | 4.52965 |
| 2012 | 4.55577 |
| 2011 | 4.62957 |
| 2010 | 4.76036 |
| 2009 | 4.82376 |
| 2008 | 4.85634 |
| 2007 | 4.82419 |
| 2006 | 4.75897 |
| 2005 | 4.62437 |
| 2004 | 4.5025 |
| 2003 | 4.422 |
| 2002 | 4.39883 |
| 2001 | 3.56909 |
| 2000 | 1.46484 |
| 1999 | 1.32942 |
| 1998 | 1.30638 |
| 1997 | 1.29432 |
| 1996 | 1.21417 |
| 1995 | 1.19353 |
| 1994 | 1.1851 |
| 1993 | 1.17236 |
| 1992 | 1.20459 |
| 1991 | 1.42705 |
| 1990 | 2.44711 |
| 1989 | 2.53758 |
| 1988 | 2.64156 |
| 1987 | 2.79417 |
| 1986 | 2.8892 |
| 1985 | 2.88573 |
| 1984 | 2.95757 |
| 1983 | 3.1092 |
| 1982 | 3.10268 |
| 1981 | 3.14591 |
| 1980 | 5.49833 |
| 1979 | 5.53538 |
| 1978 | 5.59199 |
| 1977 | 5.63267 |
| 1976 | 5.66521 |
| 1975 | 5.65983 |
| 1974 | 5.65262 |
| 1973 | 5.6337 |
| 1972 | 5.6274 |
| 1971 | 5.61448 |
| 1970 | 6.19231 |
| 1969 | 8.69768 |
| 1968 | 8.88815 |
| 1967 | 8.98815 |
| 1966 | 9.10486 |
| 1965 | 9.18308 |
| 1964 | 9.29541 |
| 1963 | 7.77561 |
| 1962 | 7.48532 |
| 1961 | 7.50212 |
| 1960 | - |