| 年份 | 索马里 |
|---|---|
| 2023 | - |
| 2022 | 1.94993 |
| 2021 | 2.04474 |
| 2020 | 2.3342 |
| 2019 | 2.56808 |
| 2018 | 2.56458 |
| 2017 | 2.89109 |
| 2016 | 2.75978 |
| 2015 | 2.36682 |
| 2014 | 2.51643 |
| 2013 | 2.29829 |
| 2012 | 0.862551 |
| 2011 | -1.25513 |
| 2010 | -0.20929 |
| 2009 | -0.125607 |
| 2008 | 0.416435 |
| 2007 | 7.23885 |
| 2006 | 1.74327 |
| 2005 | 2.18306 |
| 2004 | 2.41863 |
| 2003 | 2.4554 |
| 2002 | 3.12008 |
| 2001 | 3.37091 |
| 2000 | 3.38924 |
| 1999 | 3.44053 |
| 1998 | 3.54787 |
| 1997 | 2.91227 |
| 1996 | 3.03615 |
| 1995 | 3.02362 |
| 1994 | 4.47981 |
| 1993 | 2.44527 |
| 1992 | -5.13328 |
| 1991 | -4.37783 |
| 1990 | -1.00772 |
| 1989 | -2.24635 |
| 1988 | -0.446002 |
| 1987 | 3.13565 |
| 1986 | 3.73583 |
| 1985 | 3.66057 |
| 1984 | 3.25756 |
| 1983 | 2.79436 |
| 1982 | -0.0717139 |
| 1981 | 0.369396 |
| 1980 | 8.21144 |
| 1979 | 12.0606 |
| 1978 | 6.77422 |
| 1977 | 2.29666 |
| 1976 | 2.12813 |
| 1975 | 1.82697 |
| 1974 | 1.73918 |
| 1973 | 1.84225 |
| 1972 | 1.81706 |
| 1971 | 1.8404 |
| 1970 | 1.88015 |
| 1969 | 1.88845 |
| 1968 | 1.90898 |
| 1967 | 1.92146 |
| 1966 | 1.94442 |
| 1965 | 1.968 |
| 1964 | 1.93122 |
| 1963 | 1.91733 |
| 1962 | 1.93018 |
| 1961 | 1.94213 |
| 1960 | - |