| 年份 | 中非共和国 |
|---|---|
| 2023 | - |
| 2022 | 2.32815 |
| 2021 | 2.39257 |
| 2020 | 2.47339 |
| 2019 | 2.54849 |
| 2018 | 2.6201 |
| 2017 | 2.68524 |
| 2016 | 2.73919 |
| 2015 | 2.78747 |
| 2014 | 2.84914 |
| 2013 | 2.91545 |
| 2012 | 2.97915 |
| 2011 | 3.04876 |
| 2010 | 3.11896 |
| 2009 | 3.19225 |
| 2008 | 3.27206 |
| 2007 | 3.35723 |
| 2006 | 3.44474 |
| 2005 | 3.52934 |
| 2004 | 3.60737 |
| 2003 | 3.67878 |
| 2002 | 3.74122 |
| 2001 | 3.79441 |
| 2000 | 3.83577 |
| 1999 | 3.85853 |
| 1998 | 3.82909 |
| 1997 | 3.75479 |
| 1996 | 3.6741 |
| 1995 | 3.58407 |
| 1994 | 3.48578 |
| 1993 | 3.42148 |
| 1992 | 3.38667 |
| 1991 | 3.33922 |
| 1990 | 3.28912 |
| 1989 | 3.24377 |
| 1988 | 3.22186 |
| 1987 | 3.23437 |
| 1986 | 3.2662 |
| 1985 | 3.30553 |
| 1984 | 3.3493 |
| 1983 | 3.39515 |
| 1982 | 3.44293 |
| 1981 | 3.49472 |
| 1980 | 3.55054 |
| 1979 | 3.60815 |
| 1978 | 3.66631 |
| 1977 | 3.72499 |
| 1976 | 3.78315 |
| 1975 | 3.82695 |
| 1974 | 3.85465 |
| 1973 | 3.8775 |
| 1972 | 3.89633 |
| 1971 | 3.91468 |
| 1970 | 3.93444 |
| 1969 | 3.95529 |
| 1968 | 3.97701 |
| 1967 | 4.00072 |
| 1966 | 4.02829 |
| 1965 | 4.06122 |
| 1964 | 4.09977 |
| 1963 | 4.14531 |
| 1962 | 4.19659 |
| 1961 | 4.24772 |
| 1960 | 4.29467 |