| 年份 | 索马里 |
|---|---|
| 2023 | - |
| 2022 | 0.317878 |
| 2021 | 0.327846 |
| 2020 | 0.336013 |
| 2019 | 0.337632 |
| 2018 | 0.333648 |
| 2017 | 0.3282 |
| 2016 | 0.323262 |
| 2015 | 0.319965 |
| 2014 | 0.318201 |
| 2013 | 0.318118 |
| 2012 | 0.319787 |
| 2011 | 0.322373 |
| 2010 | 0.325148 |
| 2009 | 0.327446 |
| 2008 | 0.32928 |
| 2007 | 0.330999 |
| 2006 | 0.332666 |
| 2005 | 0.334345 |
| 2004 | 0.336017 |
| 2003 | 0.33752 |
| 2002 | 0.338859 |
| 2001 | 0.340138 |
| 2000 | 0.341373 |
| 1999 | 0.342641 |
| 1998 | 0.343977 |
| 1997 | 0.34564 |
| 1996 | 0.347628 |
| 1995 | 0.349562 |
| 1994 | 0.35177 |
| 1993 | 0.35387 |
| 1992 | 0.365052 |
| 1991 | 0.386343 |
| 1990 | 0.397499 |
| 1989 | 0.398941 |
| 1988 | 0.401728 |
| 1987 | 0.404228 |
| 1986 | 0.405051 |
| 1985 | 0.405835 |
| 1984 | 0.406364 |
| 1983 | 0.406659 |
| 1982 | 0.40691 |
| 1981 | 0.406777 |
| 1980 | 0.406295 |
| 1979 | 0.405517 |
| 1978 | 0.404329 |
| 1977 | 0.402454 |
| 1976 | 0.400224 |
| 1975 | 0.398035 |
| 1974 | 0.395472 |
| 1973 | 0.39136 |
| 1972 | 0.385663 |
| 1971 | 0.379573 |
| 1970 | 0.373267 |
| 1969 | 0.366646 |
| 1968 | 0.359636 |
| 1967 | 0.352198 |
| 1966 | 0.344169 |
| 1965 | 0.335529 |
| 1964 | 0.326216 |
| 1963 | 0.315886 |
| 1962 | 0.304664 |
| 1961 | 0.292932 |
| 1960 | 0.280738 |