| 年份 | 坦桑尼亚  | 
                                                            
|---|---|
| 2023 | - | 
| 2022 | 0.49309 | 
| 2021 | 0.491301 | 
| 2020 | 0.490357 | 
| 2019 | 0.487185 | 
| 2018 | 0.482673 | 
| 2017 | 0.479727 | 
| 2016 | 0.478646 | 
| 2015 | 0.479294 | 
| 2014 | 0.480008 | 
| 2013 | 0.479459 | 
| 2012 | 0.478559 | 
| 2011 | 0.477477 | 
| 2010 | 0.478601 | 
| 2009 | 0.482115 | 
| 2008 | 0.484148 | 
| 2007 | 0.48307 | 
| 2006 | 0.480512 | 
| 2005 | 0.478407 | 
| 2004 | 0.476754 | 
| 2003 | 0.475565 | 
| 2002 | 0.474666 | 
| 2001 | 0.473193 | 
| 2000 | 0.471133 | 
| 1999 | 0.468352 | 
| 1998 | 0.463755 | 
| 1997 | 0.457948 | 
| 1996 | 0.448916 | 
| 1995 | 0.438363 | 
| 1994 | 0.43122 | 
| 1993 | 0.424688 | 
| 1992 | 0.414082 | 
| 1991 | 0.400612 | 
| 1990 | 0.387043 | 
| 1989 | 0.373746 | 
| 1988 | 0.361148 | 
| 1987 | 0.349545 | 
| 1986 | 0.338967 | 
| 1985 | 0.32945 | 
| 1984 | 0.320672 | 
| 1983 | 0.312849 | 
| 1982 | 0.3062 | 
| 1981 | 0.299869 | 
| 1980 | 0.29393 | 
| 1979 | 0.288626 | 
| 1978 | 0.283978 | 
| 1977 | 0.280132 | 
| 1976 | 0.276841 | 
| 1975 | 0.27401 | 
| 1974 | 0.271271 | 
| 1973 | 0.26827 | 
| 1972 | 0.265661 | 
| 1971 | 0.263374 | 
| 1970 | 0.260901 | 
| 1969 | 0.258435 | 
| 1968 | 0.25578 | 
| 1967 | 0.252734 | 
| 1966 | 0.249435 | 
| 1965 | 0.246102 | 
| 1964 | 0.242765 | 
| 1963 | 0.23939 | 
| 1962 | 0.235864 | 
| 1961 | 0.232276 | 
| 1960 | 0.228596 |