| 年份 | 南苏丹 |
|---|---|
| 2023 | - |
| 2022 | 1.74503 |
| 2021 | 1.71053 |
| 2020 | 1.67322 |
| 2019 | 1.63184 |
| 2018 | 1.58269 |
| 2017 | 1.52351 |
| 2016 | 1.46405 |
| 2015 | 1.41365 |
| 2014 | 1.37416 |
| 2013 | 1.35024 |
| 2012 | 1.34222 |
| 2011 | 1.34778 |
| 2010 | 1.36561 |
| 2009 | 1.38331 |
| 2008 | 1.39162 |
| 2007 | 1.39236 |
| 2006 | 1.38648 |
| 2005 | 1.37999 |
| 2004 | 1.3759 |
| 2003 | 1.37597 |
| 2002 | 1.38119 |
| 2001 | 1.39039 |
| 2000 | 1.40189 |
| 1999 | 1.41544 |
| 1998 | 1.43495 |
| 1997 | 1.45548 |
| 1996 | 1.47272 |
| 1995 | 1.48985 |
| 1994 | 1.50653 |
| 1993 | 1.52392 |
| 1992 | 1.54166 |
| 1991 | 1.55832 |
| 1990 | 1.574 |
| 1989 | 1.58859 |
| 1988 | 1.61673 |
| 1987 | 1.64326 |
| 1986 | 1.65371 |
| 1985 | 1.66199 |
| 1984 | 1.66763 |
| 1983 | 1.66916 |
| 1982 | 1.66633 |
| 1981 | 1.66145 |
| 1980 | 1.65707 |
| 1979 | 1.65321 |
| 1978 | 1.65001 |
| 1977 | 1.64719 |
| 1976 | 1.64422 |
| 1975 | 1.64086 |
| 1974 | 1.63744 |
| 1973 | 1.63458 |
| 1972 | 1.63628 |
| 1971 | 1.64255 |
| 1970 | 1.65559 |
| 1969 | 1.67562 |
| 1968 | 1.69491 |
| 1967 | 1.71342 |
| 1966 | 1.733 |
| 1965 | 1.74899 |
| 1964 | 1.75618 |
| 1963 | 1.76295 |
| 1962 | 1.76965 |
| 1961 | 1.77652 |
| 1960 | 1.79265 |