| 年份 | 乍得 |
|---|---|
| 2023 | - |
| 2022 | - |
| 2021 | 12.504 |
| 2020 | 12.486 |
| 2019 | 12.369 |
| 2018 | 12.671 |
| 2017 | 13.043 |
| 2016 | 13.291 |
| 2015 | 13.693 |
| 2014 | 14.022 |
| 2013 | 14.373 |
| 2012 | 14.634 |
| 2011 | 15.056 |
| 2010 | 15.421 |
| 2009 | 15.765 |
| 2008 | 16.007 |
| 2007 | 16.301 |
| 2006 | 16.707 |
| 2005 | 16.827 |
| 2004 | 16.982 |
| 2003 | 17.118 |
| 2002 | 17.441 |
| 2001 | 17.695 |
| 2000 | 18.088 |
| 1999 | 18.305 |
| 1998 | 18.548 |
| 1997 | 18.692 |
| 1996 | 18.909 |
| 1995 | 19.195 |
| 1994 | 19.537 |
| 1993 | 19.718 |
| 1992 | 19.852 |
| 1991 | 20.029 |
| 1990 | 20.737 |
| 1989 | 20.086 |
| 1988 | 20.154 |
| 1987 | 21.846 |
| 1986 | 20.423 |
| 1985 | 20.723 |
| 1984 | 20.987 |
| 1983 | 21.06 |
| 1982 | 21.378 |
| 1981 | 21.89 |
| 1980 | 22.103 |
| 1979 | 22.356 |
| 1978 | 22.66 |
| 1977 | 22.922 |
| 1976 | 23.139 |
| 1975 | 23.374 |
| 1974 | 23.463 |
| 1973 | 23.458 |
| 1972 | 23.59 |
| 1971 | 24.447 |
| 1970 | 24.061 |
| 1969 | 24.308 |
| 1968 | 24.596 |
| 1967 | 24.97 |
| 1966 | 25.278 |
| 1965 | 25.412 |
| 1964 | 25.271 |
| 1963 | 25.551 |
| 1962 | 25.817 |
| 1961 | 26.049 |
| 1960 | 26.335 |