| 年份 | 南苏丹 |
|---|---|
| 2023 | - |
| 2022 | 12.0335 |
| 2021 | 11.8643 |
| 2020 | 11.5755 |
| 2019 | 11.1298 |
| 2018 | 10.5327 |
| 2017 | 9.96975 |
| 2016 | 9.64124 |
| 2015 | 9.46124 |
| 2014 | 9.42476 |
| 2013 | 9.54453 |
| 2012 | 9.71215 |
| 2011 | 9.87545 |
| 2010 | 9.98141 |
| 2009 | 10.0649 |
| 2008 | 10.0129 |
| 2007 | 9.73904 |
| 2006 | 9.4471 |
| 2005 | 9.25922 |
| 2004 | 9.11407 |
| 2003 | 9.13565 |
| 2002 | 9.38157 |
| 2001 | 9.59554 |
| 2000 | 9.67232 |
| 1999 | 9.68823 |
| 1998 | 9.66765 |
| 1997 | 9.69969 |
| 1996 | 9.83348 |
| 1995 | 9.96206 |
| 1994 | 10.0847 |
| 1993 | 10.1918 |
| 1992 | 10.2708 |
| 1991 | 10.3311 |
| 1990 | 10.3638 |
| 1989 | 10.3612 |
| 1988 | 10.1193 |
| 1987 | 9.84934 |
| 1986 | 9.76709 |
| 1985 | 9.70594 |
| 1984 | 9.67261 |
| 1983 | 9.66109 |
| 1982 | 9.65998 |
| 1981 | 9.67528 |
| 1980 | 9.70947 |
| 1979 | 9.74532 |
| 1978 | 9.77861 |
| 1977 | 9.81193 |
| 1976 | 9.83694 |
| 1975 | 9.84905 |
| 1974 | 9.84835 |
| 1973 | 9.83456 |
| 1972 | 9.79462 |
| 1971 | 9.72542 |
| 1970 | 9.62298 |
| 1969 | 9.53597 |
| 1968 | 9.53817 |
| 1967 | 9.66078 |
| 1966 | 9.88507 |
| 1965 | 10.1681 |
| 1964 | 10.4494 |
| 1963 | 10.6359 |
| 1962 | 10.6927 |
| 1961 | 10.6559 |
| 1960 | 10.5811 |