| 年份 | 肯尼亚 |
|---|---|
| 2023 | - |
| 2022 | - |
| 2021 | 18.4 |
| 2020 | 19 |
| 2019 | 19.4 |
| 2018 | 19.8 |
| 2017 | 20.2 |
| 2016 | 20.6 |
| 2015 | 21.1 |
| 2014 | 21.5 |
| 2013 | 21.9 |
| 2012 | 22.3 |
| 2011 | 22.7 |
| 2010 | 23.2 |
| 2009 | 23.7 |
| 2008 | 24.2 |
| 2007 | 24.7 |
| 2006 | 25.3 |
| 2005 | 25.7 |
| 2004 | 26.1 |
| 2003 | 26.5 |
| 2002 | 26.8 |
| 2001 | 27.1 |
| 2000 | 27.3 |
| 1999 | 27.4 |
| 1998 | 27.4 |
| 1997 | 27.4 |
| 1996 | 27.3 |
| 1995 | 27.2 |
| 1994 | 27.1 |
| 1993 | 27 |
| 1992 | 27 |
| 1991 | 27.1 |
| 1990 | 27.3 |
| 1989 | 27.7 |
| 1988 | 28.2 |
| 1987 | 28.8 |
| 1986 | 29.5 |
| 1985 | 30.1 |
| 1984 | 30.7 |
| 1983 | 31.2 |
| 1982 | 31.7 |
| 1981 | 32.2 |
| 1980 | 32.7 |
| 1979 | 33.2 |
| 1978 | 33.8 |
| 1977 | 34.3 |
| 1976 | 34.8 |
| 1975 | 35.5 |
| 1974 | 36.2 |
| 1973 | 37 |
| 1972 | 37.8 |
| 1971 | 38.6 |
| 1970 | 39.3 |
| 1969 | 39.9 |
| 1968 | 40.4 |
| 1967 | 40.9 |
| 1966 | 41.4 |
| 1965 | 42.1 |
| 1964 | 43 |
| 1963 | 44.2 |
| 1962 | 45.6 |
| 1961 | 47.2 |
| 1960 | 48.7 |