| 年份 | 南苏丹 |
|---|---|
| 2023 | - |
| 2022 | 3.1279 |
| 2021 | 2.87783 |
| 2020 | 3.00264 |
| 2019 | 1.93968 |
| 2018 | -1.11662 |
| 2017 | -2.43389 |
| 2016 | 0.113282 |
| 2015 | 1.03661 |
| 2014 | 2.10034 |
| 2013 | 4.79053 |
| 2012 | 5.40013 |
| 2011 | 6.25728 |
| 2010 | 6.01786 |
| 2009 | 5.31944 |
| 2008 | 5.48313 |
| 2007 | 5.48909 |
| 2006 | 5.44894 |
| 2005 | 5.38081 |
| 2004 | 5.31816 |
| 2003 | 5.2515 |
| 2002 | 5.23291 |
| 2001 | 5.25004 |
| 2000 | 5.19722 |
| 1999 | 3.38854 |
| 1998 | 2.72772 |
| 1997 | 3.58798 |
| 1996 | 3.25298 |
| 1995 | 3.83252 |
| 1994 | 3.23837 |
| 1993 | 5.90421 |
| 1992 | 7.6115 |
| 1991 | 8.25717 |
| 1990 | 6.82154 |
| 1989 | 3.65027 |
| 1988 | 4.36494 |
| 1987 | 7.55482 |
| 1986 | 8.44498 |
| 1985 | 8.33807 |
| 1984 | 8.36444 |
| 1983 | 4.79536 |
| 1982 | 2.27357 |
| 1981 | 2.27129 |
| 1980 | 2.25474 |
| 1979 | 2.26661 |
| 1978 | 2.27422 |
| 1977 | 2.25753 |
| 1976 | 2.27204 |
| 1975 | 2.28571 |
| 1974 | 2.29025 |
| 1973 | 2.09153 |
| 1972 | 1.84009 |
| 1971 | 1.48707 |
| 1970 | 1.0805 |
| 1969 | 1.09691 |
| 1968 | 1.09976 |
| 1967 | 1.00559 |
| 1966 | 1.19062 |
| 1965 | 1.62451 |
| 1964 | 1.57534 |
| 1963 | 1.33246 |
| 1962 | 1.32095 |
| 1961 | 1.282 |
| 1960 | - |