| 年份 | 坦桑尼亚  | 
                                                            
|---|---|
| 2023 | - | 
| 2022 | 4.6727 | 
| 2021 | 4.56399 | 
| 2020 | 4.4522 | 
| 2019 | 4.3403 | 
| 2018 | 4.227 | 
| 2017 | 4.11737 | 
| 2016 | 4.02101 | 
| 2015 | 3.93742 | 
| 2014 | 3.86469 | 
| 2013 | 3.8042 | 
| 2012 | 3.75605 | 
| 2011 | 3.72183 | 
| 2010 | 3.70293 | 
| 2009 | 3.69927 | 
| 2008 | 3.70718 | 
| 2007 | 3.72377 | 
| 2006 | 3.75161 | 
| 2005 | 3.79421 | 
| 2004 | 3.85259 | 
| 2003 | 3.92433 | 
| 2002 | 4.01343 | 
| 2001 | 4.11508 | 
| 2000 | 4.20916 | 
| 1999 | 4.28875 | 
| 1998 | 4.36103 | 
| 1997 | 4.41287 | 
| 1996 | 4.45635 | 
| 1995 | 4.47081 | 
| 1994 | 4.3999 | 
| 1993 | 4.30346 | 
| 1992 | 4.26509 | 
| 1991 | 4.25798 | 
| 1990 | 4.23712 | 
| 1989 | 4.20984 | 
| 1988 | 4.17327 | 
| 1987 | 4.05284 | 
| 1986 | 3.8839 | 
| 1985 | 3.73309 | 
| 1984 | 3.62624 | 
| 1983 | 3.55873 | 
| 1982 | 3.52103 | 
| 1981 | 3.54303 | 
| 1980 | 3.58361 | 
| 1979 | 3.62295 | 
| 1978 | 3.65789 | 
| 1977 | 3.70436 | 
| 1976 | 3.76004 | 
| 1975 | 3.82057 | 
| 1974 | 3.88076 | 
| 1973 | 3.93589 | 
| 1972 | 3.98667 | 
| 1971 | 4.03135 | 
| 1970 | 4.06806 | 
| 1969 | 4.09878 | 
| 1968 | 4.12373 | 
| 1967 | 4.14051 | 
| 1966 | 4.15248 | 
| 1965 | 4.16579 | 
| 1964 | 4.18049 | 
| 1963 | 4.19504 | 
| 1962 | 4.20808 | 
| 1961 | 4.22063 | 
| 1960 | 4.23091 |