| 年份 | 中非共和国 |
|---|---|
| 2023 | - |
| 2022 | 3.31146 |
| 2021 | 3.17437 |
| 2020 | 3.55354 |
| 2019 | 3.20011 |
| 2018 | 2.87577 |
| 2017 | 2.7571 |
| 2016 | 2.58826 |
| 2015 | 1.22103 |
| 2014 | 0.666562 |
| 2013 | 1.30399 |
| 2012 | 1.51306 |
| 2011 | 2.12433 |
| 2010 | 2.61244 |
| 2009 | 2.64188 |
| 2008 | 2.50794 |
| 2007 | 2.2551 |
| 2006 | 2.33671 |
| 2005 | 2.52227 |
| 2004 | 2.38524 |
| 2003 | 2.63442 |
| 2002 | 2.42618 |
| 2001 | 2.46658 |
| 2000 | 3.01843 |
| 1999 | 3.00078 |
| 1998 | 2.97098 |
| 1997 | 3.00194 |
| 1996 | 2.83377 |
| 1995 | 2.96985 |
| 1994 | 3.36325 |
| 1993 | 3.42318 |
| 1992 | 3.40044 |
| 1991 | 3.33283 |
| 1990 | 3.29678 |
| 1989 | 3.02858 |
| 1988 | 2.51149 |
| 1987 | 2.16746 |
| 1986 | 2.13089 |
| 1985 | 2.10814 |
| 1984 | 2.08684 |
| 1983 | 2.06359 |
| 1982 | 2.04512 |
| 1981 | 2.02339 |
| 1980 | 2.01129 |
| 1979 | 1.99836 |
| 1978 | 1.99575 |
| 1977 | 2.00077 |
| 1976 | 3.3675 |
| 1975 | 4.91222 |
| 1974 | 4.93879 |
| 1973 | 4.95996 |
| 1972 | 5.05085 |
| 1971 | 5.19407 |
| 1970 | 5.37152 |
| 1969 | 5.47962 |
| 1968 | 5.48137 |
| 1967 | 5.23717 |
| 1966 | 5.19225 |
| 1965 | 5.13917 |
| 1964 | 5.10944 |
| 1963 | 5.05075 |
| 1962 | 5.02518 |
| 1961 | 4.9951 |
| 1960 | - |