| 年份 | 南苏丹 |
|---|---|
| 2023 | - |
| 2022 | 2.05794 |
| 2021 | 2.01693 |
| 2020 | 1.97292 |
| 2019 | 1.92748 |
| 2018 | 1.87078 |
| 2017 | 1.78939 |
| 2016 | 1.70293 |
| 2015 | 1.63996 |
| 2014 | 1.59195 |
| 2013 | 1.56516 |
| 2012 | 1.57221 |
| 2011 | 1.6002 |
| 2010 | 1.64574 |
| 2009 | 1.69167 |
| 2008 | 1.72316 |
| 2007 | 1.73924 |
| 2006 | 1.74071 |
| 2005 | 1.73787 |
| 2004 | 1.73511 |
| 2003 | 1.73484 |
| 2002 | 1.73958 |
| 2001 | 1.75006 |
| 2000 | 1.76512 |
| 1999 | 1.78475 |
| 1998 | 1.81524 |
| 1997 | 1.84935 |
| 1996 | 1.87584 |
| 1995 | 1.89611 |
| 1994 | 1.90928 |
| 1993 | 1.91879 |
| 1992 | 1.92673 |
| 1991 | 1.92969 |
| 1990 | 1.92989 |
| 1989 | 1.92789 |
| 1988 | 1.93226 |
| 1987 | 1.93923 |
| 1986 | 1.93803 |
| 1985 | 1.9344 |
| 1984 | 1.93061 |
| 1983 | 1.92524 |
| 1982 | 1.91739 |
| 1981 | 1.9095 |
| 1980 | 1.90436 |
| 1979 | 1.9023 |
| 1978 | 1.90375 |
| 1977 | 1.90712 |
| 1976 | 1.90941 |
| 1975 | 1.90805 |
| 1974 | 1.90254 |
| 1973 | 1.89194 |
| 1972 | 1.87941 |
| 1971 | 1.86913 |
| 1970 | 1.86515 |
| 1969 | 1.86764 |
| 1968 | 1.87181 |
| 1967 | 1.87777 |
| 1966 | 1.88495 |
| 1965 | 1.8893 |
| 1964 | 1.88735 |
| 1963 | 1.88499 |
| 1962 | 1.88368 |
| 1961 | 1.88233 |
| 1960 | 1.88651 |