| 年份 | 乍得 |
|---|---|
| 2023 | - |
| 2022 | 17.5211 |
| 2021 | 16.4363 |
| 2020 | 15.7867 |
| 2019 | 14.8854 |
| 2018 | 17.201 |
| 2017 | 14.7664 |
| 2016 | 21.1365 |
| 2015 | 11.0076 |
| 2014 | 12.7697 |
| 2013 | 24.5223 |
| 2012 | - |
| 2011 | 22.3982 |
| 2010 | 23.6709 |
| 2009 | 32.9582 |
| 2008 | 31.3126 |
| 2007 | 26.2937 |
| 2006 | 21.5018 |
| 2005 | 7.22812 |
| 2004 | 7.92807 |
| 2003 | 6.83712 |
| 2002 | 8.52658 |
| 2001 | 8.70748 |
| 2000 | 7.48031 |
| 1999 | 7.21553 |
| 1998 | 6.19643 |
| 1997 | 6.10439 |
| 1996 | 8.77557 |
| 1995 | 7.67472 |
| 1994 | - |
| 1993 | - |
| 1992 | - |
| 1991 | - |
| 1990 | - |
| 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 | - |