| 年份 | 乍得 |
|---|---|
| 2023 | - |
| 2022 | 18.5981 |
| 2021 | 17.2918 |
| 2020 | - |
| 2019 | 15.2057 |
| 2018 | - |
| 2017 | 13.821 |
| 2016 | 12.19 |
| 2015 | 11.2956 |
| 2014 | - |
| 2013 | 10.4119 |
| 2012 | 9.50856 |
| 2011 | 8.86377 |
| 2010 | 8.44519 |
| 2009 | 8.57094 |
| 2008 | 7.46553 |
| 2007 | - |
| 2006 | - |
| 2005 | - |
| 2004 | - |
| 2003 | - |
| 2002 | - |
| 2001 | - |
| 2000 | - |
| 1999 | - |
| 1998 | - |
| 1997 | 8.28657 |
| 1996 | 8.04828 |
| 1995 | 8.116 |
| 1994 | 6.87641 |
| 1993 | - |
| 1992 | 5.54403 |
| 1991 | 6.00288 |
| 1990 | 5.39482 |
| 1989 | - |
| 1988 | - |
| 1987 | - |
| 1986 | 5.51929 |
| 1985 | 5.30023 |
| 1984 | - |
| 1983 | - |
| 1982 | - |
| 1981 | - |
| 1980 | - |
| 1979 | - |
| 1978 | - |
| 1977 | 4.90714 |
| 1976 | 9.74585 |
| 1975 | 5.59462 |
| 1974 | 5.75923 |
| 1973 | - |
| 1972 | 7.76166 |
| 1971 | 8.36726 |
| 1970 | - |
| 1969 | - |
| 1968 | - |
| 1967 | - |
| 1966 | - |
| 1965 | - |
| 1964 | - |
| 1963 | - |
| 1962 | - |
| 1961 | - |
| 1960 | - |