| 年份 | 苏丹 |
|---|---|
| 2023 | - |
| 2022 | 0.359249 |
| 2021 | 0.359987 |
| 2020 | 0.363348 |
| 2019 | 0.367031 |
| 2018 | 0.370732 |
| 2017 | 0.374922 |
| 2016 | 0.38061 |
| 2015 | 0.387799 |
| 2014 | 0.394565 |
| 2013 | 0.401571 |
| 2012 | 0.408845 |
| 2011 | 0.415471 |
| 2010 | 0.421138 |
| 2009 | 0.423062 |
| 2008 | 0.420525 |
| 2007 | 0.413274 |
| 2006 | 0.402201 |
| 2005 | 0.390222 |
| 2004 | 0.377801 |
| 2003 | 0.364479 |
| 2002 | 0.350239 |
| 2001 | 0.335791 |
| 2000 | 0.321317 |
| 1999 | 0.307534 |
| 1998 | 0.302258 |
| 1997 | 0.303143 |
| 1996 | 0.302227 |
| 1995 | 0.30161 |
| 1994 | 0.300321 |
| 1993 | 0.301794 |
| 1992 | 0.30425 |
| 1991 | 0.302234 |
| 1990 | 0.298847 |
| 1989 | 0.295908 |
| 1988 | 0.298917 |
| 1987 | 0.303972 |
| 1986 | 0.302395 |
| 1985 | 0.299632 |
| 1984 | 0.298837 |
| 1983 | 0.299569 |
| 1982 | 0.301128 |
| 1981 | 0.302926 |
| 1980 | 0.30579 |
| 1979 | 0.309637 |
| 1978 | 0.314654 |
| 1977 | 0.319979 |
| 1976 | 0.324551 |
| 1975 | 0.32836 |
| 1974 | 0.331401 |
| 1973 | 0.332296 |
| 1972 | 0.33194 |
| 1971 | 0.33265 |
| 1970 | 0.334344 |
| 1969 | 0.336335 |
| 1968 | 0.338086 |
| 1967 | 0.339839 |
| 1966 | 0.341657 |
| 1965 | 0.343056 |
| 1964 | 0.343691 |
| 1963 | 0.343842 |
| 1962 | 0.343611 |
| 1961 | 0.342568 |
| 1960 | 0.340663 |