| 年份 | 坦桑尼亚 |
|---|---|
| 2023 | - |
| 2022 | 2.95857 |
| 2021 | 3.00729 |
| 2020 | 3.01385 |
| 2019 | 3.02175 |
| 2018 | 3.18924 |
| 2017 | 3.37115 |
| 2016 | 3.47688 |
| 2015 | 3.34457 |
| 2014 | 3.11994 |
| 2013 | 3.02478 |
| 2012 | 2.90907 |
| 2011 | 2.85293 |
| 2010 | 2.58825 |
| 2009 | 2.50402 |
| 2008 | 2.72962 |
| 2007 | 2.80637 |
| 2006 | 2.8065 |
| 2005 | 2.77298 |
| 2004 | 2.71359 |
| 2003 | 2.66109 |
| 2002 | 2.61709 |
| 2001 | 2.72138 |
| 2000 | 2.83681 |
| 1999 | 2.64139 |
| 1998 | 2.61037 |
| 1997 | 2.05044 |
| 1996 | 1.88224 |
| 1995 | 3.19766 |
| 1994 | 3.89013 |
| 1993 | 3.16993 |
| 1992 | 2.53289 |
| 1991 | 2.57993 |
| 1990 | 2.64128 |
| 1989 | 2.69538 |
| 1988 | 3.04346 |
| 1987 | 3.26931 |
| 1986 | 3.28895 |
| 1985 | 3.20757 |
| 1984 | 3.19103 |
| 1983 | 3.21979 |
| 1982 | 3.01572 |
| 1981 | 3.02801 |
| 1980 | 3.15332 |
| 1979 | 3.36439 |
| 1978 | 3.52019 |
| 1977 | 3.5912 |
| 1976 | 3.59799 |
| 1975 | 3.58809 |
| 1974 | 3.55819 |
| 1973 | 3.55232 |
| 1972 | 3.51042 |
| 1971 | 3.42162 |
| 1970 | 3.36335 |
| 1969 | 3.30292 |
| 1968 | 3.13886 |
| 1967 | 2.99554 |
| 1966 | 2.976 |
| 1965 | 2.97618 |
| 1964 | 2.96111 |
| 1963 | 2.92122 |
| 1962 | 2.92389 |
| 1961 | 2.8994 |
| 1960 | - |