| 年份 | 南苏丹 |
|---|---|
| 2023 | - |
| 2022 | 9.09866 |
| 2021 | 8.3658 |
| 2020 | 7.72454 |
| 2019 | 7.16333 |
| 2018 | 6.91261 |
| 2017 | 7.26785 |
| 2016 | 7.93099 |
| 2015 | 8.39321 |
| 2014 | 8.83506 |
| 2013 | 9.11351 |
| 2012 | 8.98906 |
| 2011 | 8.80905 |
| 2010 | 8.6026 |
| 2009 | 8.41876 |
| 2008 | 8.41122 |
| 2007 | 8.52397 |
| 2006 | 8.578 |
| 2005 | 8.5271 |
| 2004 | 8.45347 |
| 2003 | 8.43589 |
| 2002 | 8.48977 |
| 2001 | 8.57801 |
| 2000 | 8.64925 |
| 1999 | 8.70172 |
| 1998 | 8.70026 |
| 1997 | 8.69884 |
| 1996 | 8.76209 |
| 1995 | 8.82469 |
| 1994 | 8.83968 |
| 1993 | 8.82504 |
| 1992 | 8.80532 |
| 1991 | 8.76787 |
| 1990 | 8.73068 |
| 1989 | 8.74705 |
| 1988 | 8.6178 |
| 1987 | 8.5103 |
| 1986 | 8.59834 |
| 1985 | 8.68846 |
| 1984 | 8.76553 |
| 1983 | 8.8188 |
| 1982 | 8.84456 |
| 1981 | 8.84175 |
| 1980 | 8.81808 |
| 1979 | 8.77347 |
| 1978 | 8.70568 |
| 1977 | 8.60961 |
| 1976 | 8.48208 |
| 1975 | 8.32472 |
| 1974 | 8.20414 |
| 1973 | 8.17044 |
| 1972 | 8.23759 |
| 1971 | 8.40613 |
| 1970 | 8.65536 |
| 1969 | 8.89912 |
| 1968 | 9.06154 |
| 1967 | 9.14974 |
| 1966 | 9.17934 |
| 1965 | 9.17714 |
| 1964 | 9.14842 |
| 1963 | 9.12588 |
| 1962 | 9.11029 |
| 1961 | 9.08695 |
| 1960 | 9.06671 |