| 年份 | 苏丹 |
|---|---|
| 2023 | - |
| 2022 | 1.09154 |
| 2021 | 1.0357 |
| 2020 | 0.978685 |
| 2019 | 0.922992 |
| 2018 | 0.868984 |
| 2017 | 0.816169 |
| 2016 | 0.767556 |
| 2015 | 0.724583 |
| 2014 | 0.688602 |
| 2013 | 0.660241 |
| 2012 | 0.639478 |
| 2011 | 0.625943 |
| 2010 | 0.61895 |
| 2009 | 0.618508 |
| 2008 | 0.624412 |
| 2007 | 0.635946 |
| 2006 | 0.653524 |
| 2005 | 0.678319 |
| 2004 | 0.709371 |
| 2003 | 0.743742 |
| 2002 | 0.779904 |
| 2001 | 0.814502 |
| 2000 | 0.843496 |
| 1999 | 0.865602 |
| 1998 | 0.883561 |
| 1997 | 0.892689 |
| 1996 | 0.891621 |
| 1995 | 0.88695 |
| 1994 | 0.87555 |
| 1993 | 0.854156 |
| 1992 | 0.823553 |
| 1991 | 0.787181 |
| 1990 | 0.750924 |
| 1989 | 0.718725 |
| 1988 | 0.713465 |
| 1987 | 0.726585 |
| 1986 | 0.727499 |
| 1985 | 0.7249 |
| 1984 | 0.7246 |
| 1983 | 0.727899 |
| 1982 | 0.734006 |
| 1981 | 0.740101 |
| 1980 | 0.746197 |
| 1979 | 0.75194 |
| 1978 | 0.757256 |
| 1977 | 0.760915 |
| 1976 | 0.762822 |
| 1975 | 0.764324 |
| 1974 | 0.765555 |
| 1973 | 0.764465 |
| 1972 | 0.763299 |
| 1971 | 0.766382 |
| 1970 | 0.77373 |
| 1969 | 0.785191 |
| 1968 | 0.801441 |
| 1967 | 0.82138 |
| 1966 | 0.841264 |
| 1965 | 0.858281 |
| 1964 | 0.87197 |
| 1963 | 0.881654 |
| 1962 | 0.887492 |
| 1961 | 0.892023 |
| 1960 | 0.897711 |