| 年份 | 乍得 |
|---|---|
| 2023 | - |
| 2022 | - |
| 2021 | - |
| 2020 | 0.873455 |
| 2019 | 0.895071 |
| 2018 | 0.676105 |
| 2017 | 0.740654 |
| 2016 | 0.866174 |
| 2015 | 0.886424 |
| 2014 | 0.90697 |
| 2013 | 0.816861 |
| 2012 | 0.840965 |
| 2011 | 0.864706 |
| 2010 | 0.888639 |
| 2009 | 0.915805 |
| 2008 | 0.940812 |
| 2007 | 0.96666 |
| 2006 | - |
| 2005 | 1.01823 |
| 2004 | 1.02468 |
| 2003 | 1.0959 |
| 2002 | 1.13922 |
| 2001 | 1.16824 |
| 2000 | 1.18387 |
| 1999 | 1.22164 |
| 1998 | 1.25342 |
| 1997 | 1.28161 |
| 1996 | 1.30768 |
| 1995 | 1.36042 |
| 1994 | 1.62885 |
| 1993 | 1.22642 |
| 1992 | 1.57077 |
| 1991 | 2.16492 |
| 1990 | 2.24923 |
| 1989 | - |
| 1988 | - |
| 1987 | - |
| 1986 | - |
| 1985 | - |
| 1984 | - |
| 1983 | - |
| 1982 | - |
| 1981 | - |
| 1980 | - |
| 1979 | - |
| 1978 | - |
| 1977 | - |
| 1976 | - |
| 1975 | - |
| 1974 | - |
| 1973 | - |
| 1972 | - |
| 1971 | - |
| 1970 | - |
| 1969 | - |
| 1968 | - |
| 1967 | - |
| 1966 | - |
| 1965 | - |
| 1964 | - |
| 1963 | - |
| 1962 | - |
| 1961 | - |
| 1960 | - |