| 年份 | 坦桑尼亚  | 
                                                            
|---|---|
| 2023 | - | 
| 2022 | 0.31452 | 
| 2021 | 0.315052 | 
| 2020 | 0.316105 | 
| 2019 | 0.313871 | 
| 2018 | 0.308748 | 
| 2017 | 0.304959 | 
| 2016 | 0.302841 | 
| 2015 | 0.302333 | 
| 2014 | 0.301805 | 
| 2013 | 0.300015 | 
| 2012 | 0.298122 | 
| 2011 | 0.296216 | 
| 2010 | 0.296876 | 
| 2009 | 0.300519 | 
| 2008 | 0.303079 | 
| 2007 | 0.302719 | 
| 2006 | 0.301003 | 
| 2005 | 0.300038 | 
| 2004 | 0.29996 | 
| 2003 | 0.300864 | 
| 2002 | 0.303019 | 
| 2001 | 0.305325 | 
| 2000 | 0.307333 | 
| 1999 | 0.308832 | 
| 1998 | 0.308723 | 
| 1997 | 0.307505 | 
| 1996 | 0.30283 | 
| 1995 | 0.296653 | 
| 1994 | 0.294116 | 
| 1993 | 0.292191 | 
| 1992 | 0.285597 | 
| 1991 | 0.275688 | 
| 1990 | 0.265679 | 
| 1989 | 0.255831 | 
| 1988 | 0.246029 | 
| 1987 | 0.237709 | 
| 1986 | 0.230949 | 
| 1985 | 0.225161 | 
| 1984 | 0.219864 | 
| 1983 | 0.215394 | 
| 1982 | 0.212135 | 
| 1981 | 0.208684 | 
| 1980 | 0.20509 | 
| 1979 | 0.20173 | 
| 1978 | 0.199065 | 
| 1977 | 0.19693 | 
| 1976 | 0.194898 | 
| 1975 | 0.193037 | 
| 1974 | 0.191287 | 
| 1973 | 0.189322 | 
| 1972 | 0.187255 | 
| 1971 | 0.1851 | 
| 1970 | 0.182762 | 
| 1969 | 0.180324 | 
| 1968 | 0.177701 | 
| 1967 | 0.174763 | 
| 1966 | 0.171645 | 
| 1965 | 0.168532 | 
| 1964 | 0.165514 | 
| 1963 | 0.162559 | 
| 1962 | 0.159556 | 
| 1961 | 0.156562 | 
| 1960 | 0.153546 |