| 年份 | 乍得  | 
                                                            
|---|---|
| 2023 | - | 
| 2022 | - | 
| 2021 | 4.57787 | 
| 2020 | 4.70124 | 
| 2019 | 4.0792 | 
| 2018 | 4.32777 | 
| 2017 | 6.6096 | 
| 2016 | 6.51176 | 
| 2015 | 5.67319 | 
| 2014 | 4.31922 | 
| 2013 | 4.26303 | 
| 2012 | 4.26216 | 
| 2011 | 3.75353 | 
| 2010 | 3.73803 | 
| 2009 | 4.71043 | 
| 2008 | 4.24745 | 
| 2007 | 4.09232 | 
| 2006 | 3.39766 | 
| 2005 | 3.64957 | 
| 2004 | 5.06646 | 
| 2003 | 9.5955 | 
| 2002 | 8.65186 | 
| 2001 | 8.36505 | 
| 2000 | 10.5735 | 
| 1999 | 9.50402 | 
| 1998 | 11.6317 | 
| 1997 | 12.4552 | 
| 1996 | 12.7277 | 
| 1995 | 14.2163 | 
| 1994 | 12.1988 | 
| 1993 | 8.50697 | 
| 1992 | 7.23066 | 
| 1991 | 6.91105 | 
| 1990 | 7.51735 | 
| 1989 | 7.07578 | 
| 1988 | 6.58618 | 
| 1987 | 7.90417 | 
| 1986 | 8.60107 | 
| 1985 | 5.73037 | 
| 1984 | 8.31292 | 
| 1983 | 10.0342 | 
| 1982 | 14.6271 | 
| 1981 | 10.3707 | 
| 1980 | 10.0784 | 
| 1979 | 8.47666 | 
| 1978 | 7.21981 | 
| 1977 | 8.09745 | 
| 1976 | 5.35463 | 
| 1975 | 5.68187 | 
| 1974 | 5.81664 | 
| 1973 | 5.08371 | 
| 1972 | 3.47021 | 
| 1971 | 3.41328 | 
| 1970 | 3.97796 | 
| 1969 | - | 
| 1968 | - | 
| 1967 | - | 
| 1966 | - | 
| 1965 | - | 
| 1964 | - | 
| 1963 | - | 
| 1962 | - | 
| 1961 | - | 
| 1960 | - |