| 年份 | 南苏丹 |
|---|---|
| 2023 | - |
| 2022 | 2.41231 |
| 2021 | 2.36372 |
| 2020 | 2.31743 |
| 2019 | 2.26961 |
| 2018 | 2.21577 |
| 2017 | 2.15392 |
| 2016 | 2.09301 |
| 2015 | 2.04323 |
| 2014 | 1.99828 |
| 2013 | 1.95688 |
| 2012 | 1.91844 |
| 2011 | 1.87824 |
| 2010 | 1.83481 |
| 2009 | 1.79715 |
| 2008 | 1.77472 |
| 2007 | 1.7683 |
| 2006 | 1.77975 |
| 2005 | 1.80805 |
| 2004 | 1.83878 |
| 2003 | 1.86013 |
| 2002 | 1.87321 |
| 2001 | 1.87862 |
| 2000 | 1.88269 |
| 1999 | 1.88913 |
| 1998 | 1.90168 |
| 1997 | 1.91952 |
| 1996 | 1.94019 |
| 1995 | 1.96209 |
| 1994 | 1.98365 |
| 1993 | 2.00745 |
| 1992 | 2.03348 |
| 1991 | 2.05849 |
| 1990 | 2.08324 |
| 1989 | 2.10931 |
| 1988 | 2.13567 |
| 1987 | 2.16224 |
| 1986 | 2.18822 |
| 1985 | 2.21188 |
| 1984 | 2.23206 |
| 1983 | 2.24606 |
| 1982 | 2.25262 |
| 1981 | 2.25409 |
| 1980 | 2.25408 |
| 1979 | 2.2532 |
| 1978 | 2.25121 |
| 1977 | 2.24841 |
| 1976 | 2.24621 |
| 1975 | 2.24495 |
| 1974 | 2.24407 |
| 1973 | 2.24387 |
| 1972 | 2.24848 |
| 1971 | 2.25725 |
| 1970 | 2.27188 |
| 1969 | 2.29328 |
| 1968 | 2.31468 |
| 1967 | 2.33564 |
| 1966 | 2.35704 |
| 1965 | 2.37365 |
| 1964 | 2.38088 |
| 1963 | 2.38739 |
| 1962 | 2.39207 |
| 1961 | 2.39108 |
| 1960 | 2.39004 |