| 年份 | 乍得 |
|---|---|
| 2023 | - |
| 2022 | - |
| 2021 | - |
| 2020 | 2.55032 |
| 2019 | - |
| 2018 | - |
| 2017 | - |
| 2016 | - |
| 2015 | 1.5055 |
| 2014 | 1.15639 |
| 2013 | - |
| 2012 | - |
| 2011 | 0.87862 |
| 2010 | 0.64047 |
| 2009 | 0.61147 |
| 2008 | 0.51279 |
| 2007 | - |
| 2006 | - |
| 2005 | 0.17601 |
| 2004 | 0.31366 |
| 2003 | 0.19931 |
| 2002 | - |
| 2001 | 0.25302 |
| 2000 | 0.2453 |
| 1999 | - |
| 1998 | 0.19065 |
| 1997 | 0.16343 |
| 1996 | 0.135 |
| 1995 | - |
| 1994 | - |
| 1993 | - |
| 1992 | - |
| 1991 | - |
| 1990 | - |
| 1989 | - |
| 1988 | - |
| 1987 | - |
| 1986 | - |
| 1985 | 0.06578 |
| 1984 | - |
| 1983 | - |
| 1982 | - |
| 1981 | - |
| 1980 | - |
| 1979 | - |
| 1978 | - |
| 1977 | 0.02166 |
| 1976 | 0.0159 |
| 1975 | 0.01002 |
| 1974 | 0.02663 |
| 1973 | 0.00358 |
| 1972 | - |
| 1971 | - |
| 1970 | - |
| 1969 | - |
| 1968 | - |
| 1967 | - |
| 1966 | - |
| 1965 | - |
| 1964 | - |
| 1963 | - |
| 1962 | - |
| 1961 | - |
| 1960 | - |