| 年份 | 坦桑尼亚  | 
                                                            
|---|---|
| 2023 | - | 
| 2022 | - | 
| 2021 | 0.049401 | 
| 2020 | 0.0264008 | 
| 2019 | 0.032897 | 
| 2018 | 0.04247 | 
| 2017 | 0.0343089 | 
| 2016 | 0.0136027 | 
| 2015 | 0.0118307 | 
| 2014 | 0.015203 | 
| 2013 | 0.0078919 | 
| 2012 | 0.0104791 | 
| 2011 | 0.0180556 | 
| 2010 | - | 
| 2009 | - | 
| 2008 | 0.00529042 | 
| 2007 | 0.00565739 | 
| 2006 | 0.00311071 | 
| 2005 | 0.00497848 | 
| 2004 | 0.0144969 | 
| 2003 | 0.00439219 | 
| 2002 | 0.0059497 | 
| 2001 | 0.00934607 | 
| 2000 | 0.00549718 | 
| 1999 | 0.00378137 | 
| 1998 | 0.00345194 | 
| 1997 | 0.00474448 | 
| 1996 | 0.0142512 | 
| 1995 | 0.0155847 | 
| 1994 | 0.013263 | 
| 1993 | 0.01293 | 
| 1992 | 0.00164001 | 
| 1991 | 0.00167763 | 
| 1990 | 0.00199503 | 
| 1989 | 0.00136884 | 
| 1988 | 0.000917322 | 
| 1987 | - | 
| 1986 | - | 
| 1985 | - | 
| 1984 | - | 
| 1983 | - | 
| 1982 | - | 
| 1981 | - | 
| 1980 | - | 
| 1979 | - | 
| 1978 | - | 
| 1977 | - | 
| 1976 | - | 
| 1975 | - | 
| 1974 | - | 
| 1973 | - | 
| 1972 | - | 
| 1971 | - | 
| 1970 | - | 
| 1969 | - | 
| 1968 | - | 
| 1967 | - | 
| 1966 | - | 
| 1965 | - | 
| 1964 | - | 
| 1963 | - | 
| 1962 | - | 
| 1961 | - | 
| 1960 | - |