| 年份 | 南苏丹 |
|---|---|
| 2023 | - |
| 2022 | 1.10393 |
| 2021 | 0.934855 |
| 2020 | 1.13103 |
| 2019 | 0.148281 |
| 2018 | -2.83163 |
| 2017 | -4.06991 |
| 2016 | -1.44798 |
| 2015 | -0.447568 |
| 2014 | 0.702132 |
| 2013 | 3.46706 |
| 2012 | 4.15347 |
| 2011 | 5.08919 |
| 2010 | 4.93021 |
| 2009 | 4.31404 |
| 2008 | 4.54752 |
| 2007 | 4.56176 |
| 2006 | 4.51593 |
| 2005 | 4.45618 |
| 2004 | 4.38079 |
| 2003 | 4.32253 |
| 2002 | 4.30548 |
| 2001 | 4.324 |
| 2000 | 4.2655 |
| 1999 | 2.45815 |
| 1998 | 1.79903 |
| 1997 | 2.65326 |
| 1996 | 2.32729 |
| 1995 | 2.90091 |
| 1994 | 2.30856 |
| 1993 | 0.384438 |
| 1992 | 0.847842 |
| 1991 | 1.49547 |
| 1990 | 0.0631495 |
| 1989 | -3.09361 |
| 1988 | -2.40074 |
| 1987 | 0.798016 |
| 1986 | 1.67923 |
| 1985 | 1.58828 |
| 1984 | 1.5999 |
| 1983 | 2.11159 |
| 1982 | 2.41502 |
| 1981 | 2.41271 |
| 1980 | 2.40845 |
| 1979 | 2.40762 |
| 1978 | 2.41475 |
| 1977 | 2.411 |
| 1976 | 2.41251 |
| 1975 | 2.42564 |
| 1974 | 2.44334 |
| 1973 | 2.23127 |
| 1972 | 1.99256 |
| 1971 | 1.62643 |
| 1970 | 1.2328 |
| 1969 | 1.23597 |
| 1968 | 1.23877 |
| 1967 | 1.15724 |
| 1966 | 1.32928 |
| 1965 | 1.77565 |
| 1964 | 1.72628 |
| 1963 | 1.47075 |
| 1962 | 1.47134 |
| 1961 | 1.42002 |
| 1960 | - |