| 年份 | 索马里 |
|---|---|
| 2023 | - |
| 2022 | 0.21226 |
| 2021 | 0.222322 |
| 2020 | 0.232086 |
| 2019 | 0.236027 |
| 2018 | 0.234527 |
| 2017 | 0.232321 |
| 2016 | 0.230447 |
| 2015 | 0.229426 |
| 2014 | 0.229026 |
| 2013 | 0.22913 |
| 2012 | 0.229914 |
| 2011 | 0.231317 |
| 2010 | 0.23295 |
| 2009 | 0.234163 |
| 2008 | 0.234969 |
| 2007 | 0.235693 |
| 2006 | 0.236338 |
| 2005 | 0.236912 |
| 2004 | 0.237473 |
| 2003 | 0.238102 |
| 2002 | 0.238708 |
| 2001 | 0.239139 |
| 2000 | 0.239378 |
| 1999 | 0.23957 |
| 1998 | 0.239845 |
| 1997 | 0.24036 |
| 1996 | 0.241127 |
| 1995 | 0.242027 |
| 1994 | 0.243037 |
| 1993 | 0.243833 |
| 1992 | 0.253009 |
| 1991 | 0.272004 |
| 1990 | 0.282236 |
| 1989 | 0.283657 |
| 1988 | 0.286077 |
| 1987 | 0.287772 |
| 1986 | 0.287639 |
| 1985 | 0.287233 |
| 1984 | 0.286643 |
| 1983 | 0.285792 |
| 1982 | 0.284683 |
| 1981 | 0.283282 |
| 1980 | 0.281662 |
| 1979 | 0.279808 |
| 1978 | 0.277705 |
| 1977 | 0.275016 |
| 1976 | 0.271965 |
| 1975 | 0.268844 |
| 1974 | 0.26517 |
| 1973 | 0.260082 |
| 1972 | 0.253695 |
| 1971 | 0.247071 |
| 1970 | 0.240525 |
| 1969 | 0.23423 |
| 1968 | 0.228088 |
| 1967 | 0.222165 |
| 1966 | 0.216176 |
| 1965 | 0.209697 |
| 1964 | 0.202921 |
| 1963 | 0.195738 |
| 1962 | 0.187934 |
| 1961 | 0.179981 |
| 1960 | 0.171882 |