| 年份 | 中非共和国 |
|---|---|
| 2023 | - |
| 2022 | 1.3844 |
| 2021 | 1.33209 |
| 2020 | 1.79636 |
| 2019 | 1.52854 |
| 2018 | 1.29028 |
| 2017 | 1.25841 |
| 2016 | 1.17257 |
| 2015 | -0.102718 |
| 2014 | -0.568731 |
| 2013 | 0.153518 |
| 2012 | 0.452113 |
| 2011 | 1.15344 |
| 2010 | 1.72809 |
| 2009 | 1.84868 |
| 2008 | 1.80204 |
| 2007 | 1.63711 |
| 2006 | 1.81107 |
| 2005 | 2.08514 |
| 2004 | 2.03691 |
| 2003 | 2.2859 |
| 2002 | 2.07719 |
| 2001 | 2.12168 |
| 2000 | 2.66897 |
| 1999 | 2.65089 |
| 1998 | 2.62516 |
| 1997 | 2.65149 |
| 1996 | 2.48729 |
| 1995 | 2.61884 |
| 1994 | 3.01625 |
| 1993 | 3.07574 |
| 1992 | 3.05274 |
| 1991 | 2.98488 |
| 1990 | 2.94845 |
| 1989 | 2.17143 |
| 1988 | 1.04665 |
| 1987 | 0.701125 |
| 1986 | 0.667184 |
| 1985 | 0.646896 |
| 1984 | 0.619353 |
| 1983 | 0.598326 |
| 1982 | 0.582002 |
| 1981 | 0.562616 |
| 1980 | 0.543448 |
| 1979 | 0.536986 |
| 1978 | 0.531677 |
| 1977 | 0.538293 |
| 1976 | 0.604067 |
| 1975 | 0.621079 |
| 1974 | 0.643209 |
| 1973 | 0.671846 |
| 1972 | 0.74922 |
| 1971 | 0.901 |
| 1970 | 1.08074 |
| 1969 | 1.18995 |
| 1968 | 1.18059 |
| 1967 | 1.20728 |
| 1966 | 1.16021 |
| 1965 | 1.11568 |
| 1964 | 1.07123 |
| 1963 | 1.04456 |
| 1962 | 1.0164 |
| 1961 | 0.989276 |
| 1960 | - |