| 年份 | 南苏丹 |
|---|---|
| 2023 | - |
| 2022 | 4.18842 |
| 2021 | 4.16545 |
| 2020 | 4.12112 |
| 2019 | 4.05409 |
| 2018 | 3.96974 |
| 2017 | 3.88308 |
| 2016 | 3.80202 |
| 2015 | 3.72151 |
| 2014 | 3.65239 |
| 2013 | 3.59145 |
| 2012 | 3.52487 |
| 2011 | 3.4632 |
| 2010 | 3.40218 |
| 2009 | 3.34383 |
| 2008 | 3.29136 |
| 2007 | 3.23905 |
| 2006 | 3.18699 |
| 2005 | 3.13747 |
| 2004 | 3.09224 |
| 2003 | 3.05001 |
| 2002 | 3.00832 |
| 2001 | 2.96333 |
| 2000 | 2.9111 |
| 1999 | 2.87232 |
| 1998 | 2.86095 |
| 1997 | 2.88482 |
| 1996 | 2.95205 |
| 1995 | 3.04798 |
| 1994 | 3.13577 |
| 1993 | 3.2032 |
| 1992 | 3.25443 |
| 1991 | 3.28151 |
| 1990 | 3.2994 |
| 1989 | 3.32142 |
| 1988 | 3.31153 |
| 1987 | 3.30999 |
| 1986 | 3.34724 |
| 1985 | 3.38115 |
| 1984 | 3.41362 |
| 1983 | 3.44109 |
| 1982 | 3.46117 |
| 1981 | 3.47799 |
| 1980 | 3.49704 |
| 1979 | 3.51828 |
| 1978 | 3.54103 |
| 1977 | 3.56479 |
| 1976 | 3.58939 |
| 1975 | 3.61416 |
| 1974 | 3.63723 |
| 1973 | 3.65701 |
| 1972 | 3.67621 |
| 1971 | 3.69519 |
| 1970 | 3.71549 |
| 1969 | 3.73676 |
| 1968 | 3.75341 |
| 1967 | 3.76654 |
| 1966 | 3.77907 |
| 1965 | 3.78912 |
| 1964 | 3.79421 |
| 1963 | 3.79991 |
| 1962 | 3.8064 |
| 1961 | 3.80976 |
| 1960 | 3.81084 |