| 年份 | 乍得 |
|---|---|
| 2023 | - |
| 2022 | 20.0782 |
| 2021 | 20.0603 |
| 2020 | - |
| 2019 | 18.7778 |
| 2018 | 18.6257 |
| 2017 | 17.7653 |
| 2016 | 17.9617 |
| 2015 | 18.0588 |
| 2014 | - |
| 2013 | - |
| 2012 | 15.37 |
| 2011 | 15.2987 |
| 2010 | - |
| 2009 | - |
| 2008 | 13.8492 |
| 2007 | 13.3725 |
| 2006 | 11.9981 |
| 2005 | 11.5013 |
| 2004 | 9.53539 |
| 2003 | 9.42882 |
| 2002 | 10.5879 |
| 2001 | 10.1165 |
| 2000 | 9.60715 |
| 1999 | 9.34292 |
| 1998 | 9.29473 |
| 1997 | 8.24549 |
| 1996 | 8.46195 |
| 1995 | 7.81781 |
| 1994 | 7.09714 |
| 1993 | - |
| 1992 | 6.20206 |
| 1991 | 5.88972 |
| 1990 | 5.99154 |
| 1989 | 5.27755 |
| 1988 | - |
| 1987 | - |
| 1986 | 3.51538 |
| 1985 | - |
| 1984 | - |
| 1983 | - |
| 1982 | - |
| 1981 | - |
| 1980 | - |
| 1979 | - |
| 1978 | - |
| 1977 | - |
| 1976 | - |
| 1975 | - |
| 1974 | - |
| 1973 | - |
| 1972 | 5.34433 |
| 1971 | 5.02833 |
| 1970 | - |
| 1969 | - |
| 1968 | - |
| 1967 | - |
| 1966 | - |
| 1965 | - |
| 1964 | - |
| 1963 | - |
| 1962 | - |
| 1961 | - |
| 1960 | - |