| 年份 | 中非共和国 |
|---|---|
| 2023 | - |
| 2022 | 3.00312 |
| 2021 | 2.99652 |
| 2020 | 2.98822 |
| 2019 | 2.97653 |
| 2018 | 2.99913 |
| 2017 | 3.05411 |
| 2016 | 3.13018 |
| 2015 | 3.22423 |
| 2014 | 3.35706 |
| 2013 | 3.4909 |
| 2012 | 3.59106 |
| 2011 | 3.67016 |
| 2010 | 3.72516 |
| 2009 | 3.76387 |
| 2008 | 3.80157 |
| 2007 | 3.8511 |
| 2006 | 3.91867 |
| 2005 | 3.99474 |
| 2004 | 4.07763 |
| 2003 | 4.17361 |
| 2002 | 4.27328 |
| 2001 | 4.37639 |
| 2000 | 4.47937 |
| 1999 | 4.57392 |
| 1998 | 4.65953 |
| 1997 | 4.73345 |
| 1996 | 4.79333 |
| 1995 | 4.8371 |
| 1994 | 4.85551 |
| 1993 | 4.80486 |
| 1992 | 4.69723 |
| 1991 | 4.58259 |
| 1990 | 4.4575 |
| 1989 | 4.32606 |
| 1988 | 4.24705 |
| 1987 | 4.21508 |
| 1986 | 4.17529 |
| 1985 | 4.13885 |
| 1984 | 4.11584 |
| 1983 | 4.11169 |
| 1982 | 4.12607 |
| 1981 | 4.15396 |
| 1980 | 4.18992 |
| 1979 | 4.23031 |
| 1978 | 4.27195 |
| 1977 | 4.3141 |
| 1976 | 4.35966 |
| 1975 | 4.40897 |
| 1974 | 4.45984 |
| 1973 | 4.5103 |
| 1972 | 4.56012 |
| 1971 | 4.60672 |
| 1970 | 4.64745 |
| 1969 | 4.68172 |
| 1968 | 4.70931 |
| 1967 | 4.73086 |
| 1966 | 4.74961 |
| 1965 | 4.76825 |
| 1964 | 4.78631 |
| 1963 | 4.80307 |
| 1962 | 4.82123 |
| 1961 | 4.84451 |
| 1960 | 4.87492 |