| 年份 | 南苏丹 |
|---|---|
| 2023 | - |
| 2022 | 2.8903 |
| 2021 | 2.84682 |
| 2020 | 2.8006 |
| 2019 | 2.74526 |
| 2018 | 2.68112 |
| 2017 | 2.61388 |
| 2016 | 2.56188 |
| 2015 | 2.5378 |
| 2014 | 2.53038 |
| 2013 | 2.52842 |
| 2012 | 2.52516 |
| 2011 | 2.51798 |
| 2010 | 2.50949 |
| 2009 | 2.49951 |
| 2008 | 2.49016 |
| 2007 | 2.4807 |
| 2006 | 2.4719 |
| 2005 | 2.46509 |
| 2004 | 2.46013 |
| 2003 | 2.45677 |
| 2002 | 2.45559 |
| 2001 | 2.45461 |
| 2000 | 2.45134 |
| 1999 | 2.44608 |
| 1998 | 2.46929 |
| 1997 | 2.49418 |
| 1996 | 2.49085 |
| 1995 | 2.48603 |
| 1994 | 2.47272 |
| 1993 | 2.46233 |
| 1992 | 2.46212 |
| 1991 | 2.45625 |
| 1990 | 2.44491 |
| 1989 | 2.4345 |
| 1988 | 2.50885 |
| 1987 | 2.591 |
| 1986 | 2.5956 |
| 1985 | 2.59251 |
| 1984 | 2.5884 |
| 1983 | 2.57984 |
| 1982 | 2.56345 |
| 1981 | 2.54228 |
| 1980 | 2.52103 |
| 1979 | 2.50087 |
| 1978 | 2.48129 |
| 1977 | 2.46174 |
| 1976 | 2.44451 |
| 1975 | 2.42927 |
| 1974 | 2.41463 |
| 1973 | 2.40018 |
| 1972 | 2.39769 |
| 1971 | 2.40975 |
| 1970 | 2.44457 |
| 1969 | 2.50478 |
| 1968 | 2.56974 |
| 1967 | 2.63982 |
| 1966 | 2.72073 |
| 1965 | 2.79639 |
| 1964 | 2.84866 |
| 1963 | 2.90771 |
| 1962 | 2.97077 |
| 1961 | 3.01917 |
| 1960 | 3.06654 |