| 年份 | 中非共和国 |
|---|---|
| 2023 | - |
| 2022 | 2.2108 |
| 2021 | 2.11364 |
| 2020 | 2.53409 |
| 2019 | 2.22336 |
| 2018 | 1.94306 |
| 2017 | 1.86986 |
| 2016 | 1.74518 |
| 2015 | 0.42834 |
| 2014 | -0.076949 |
| 2013 | 0.608248 |
| 2012 | 0.868655 |
| 2011 | 1.53228 |
| 2010 | 2.07121 |
| 2009 | 2.15485 |
| 2008 | 2.07326 |
| 2007 | 1.87359 |
| 2006 | 2.0115 |
| 2005 | 2.25133 |
| 2004 | 2.16902 |
| 2003 | 2.41779 |
| 2002 | 2.20897 |
| 2001 | 2.25164 |
| 2000 | 2.80036 |
| 1999 | 2.78215 |
| 1998 | 2.75462 |
| 1997 | 2.7824 |
| 1996 | 2.61643 |
| 1995 | 2.74938 |
| 1994 | 3.14502 |
| 1993 | 3.20439 |
| 1992 | 3.1812 |
| 1991 | 3.11316 |
| 1990 | 3.07658 |
| 1989 | 2.48553 |
| 1988 | 1.57949 |
| 1987 | 1.22954 |
| 1986 | 1.18973 |
| 1985 | 1.16366 |
| 1984 | 1.13343 |
| 1983 | 1.10674 |
| 1982 | 1.08483 |
| 1981 | 1.05983 |
| 1980 | 1.03826 |
| 1979 | 1.02484 |
| 1978 | 1.01568 |
| 1977 | 1.01705 |
| 1976 | 1.4959 |
| 1975 | 1.97308 |
| 1974 | 1.95713 |
| 1973 | 1.94474 |
| 1972 | 1.9879 |
| 1971 | 2.09974 |
| 1970 | 2.24213 |
| 1969 | 2.31507 |
| 1968 | 2.27325 |
| 1967 | 2.19963 |
| 1966 | 2.12323 |
| 1965 | 2.04751 |
| 1964 | 1.97782 |
| 1963 | 1.91621 |
| 1962 | 1.86158 |
| 1961 | 1.80743 |
| 1960 | - |