| 年份 | 中非共和国 |
|---|---|
| 2023 | - |
| 2022 | 2.51116 |
| 2021 | 2.49913 |
| 2020 | 2.47887 |
| 2019 | 2.43625 |
| 2018 | 2.37511 |
| 2017 | 2.30941 |
| 2016 | 2.24164 |
| 2015 | 2.17343 |
| 2014 | 2.11184 |
| 2013 | 2.07329 |
| 2012 | 2.05164 |
| 2011 | 2.03382 |
| 2010 | 2.01948 |
| 2009 | 2.00762 |
| 2008 | 1.99956 |
| 2007 | 1.9968 |
| 2006 | 2.00099 |
| 2005 | 2.01069 |
| 2004 | 2.02312 |
| 2003 | 2.03914 |
| 2002 | 2.05792 |
| 2001 | 2.08344 |
| 2000 | 2.11446 |
| 1999 | 2.14582 |
| 1998 | 2.17927 |
| 1997 | 2.2163 |
| 1996 | 2.2582 |
| 1995 | 2.30661 |
| 1994 | 2.36059 |
| 1993 | 2.41971 |
| 1992 | 2.48781 |
| 1991 | 2.56822 |
| 1990 | 2.66177 |
| 1989 | 2.76892 |
| 1988 | 2.88934 |
| 1987 | 3.01681 |
| 1986 | 3.14374 |
| 1985 | 3.26726 |
| 1984 | 3.38721 |
| 1983 | 3.50239 |
| 1982 | 3.60993 |
| 1981 | 3.705 |
| 1980 | 3.78394 |
| 1979 | 3.84604 |
| 1978 | 3.89096 |
| 1977 | 3.91945 |
| 1976 | 3.93306 |
| 1975 | 3.93957 |
| 1974 | 3.94667 |
| 1973 | 3.95468 |
| 1972 | 3.96499 |
| 1971 | 3.97975 |
| 1970 | 4.00059 |
| 1969 | 4.02762 |
| 1968 | 4.06061 |
| 1967 | 4.0961 |
| 1966 | 4.12978 |
| 1965 | 4.16035 |
| 1964 | 4.18716 |
| 1963 | 4.20926 |
| 1962 | 4.23004 |
| 1961 | 4.25728 |
| 1960 | 4.29584 |