| 年份 | 乍得 |
| 人口 | 占世界% |
| 2021 | 8.64百万 (8,644,889) | 0.1689% |
| 2020 | 8.35百万 (8,347,423) | 0.1645% |
| 2019 | 8.07百万 (8,067,277) | 0.1605% |
| 2018 | 7.79百万 (7,785,176) | 0.1564% |
| 2017 | 7.50百万 (7,504,762) | 0.1523% |
| 2016 | 7.24百万 (7,242,411) | 0.1484% |
| 2015 | 7.02百万 (7,015,679) | 0.1453% |
| 2014 | 6.80百万 (6,795,089) | 0.1423% |
| 2013 | 6.54百万 (6,536,644) | 0.1385% |
| 2012 | 6.29百万 (6,291,705) | 0.1349% |
| 2011 | 6.06百万 (6,063,980) | 0.1316% |
| 2010 | 5.85百万 (5,848,080) | 0.1286% |
| 2009 | 5.65百万 (5,653,756) | 0.1260% |
| 2008 | 5.45百万 (5,450,246) | 0.1232% |
| 2007 | 5.26百万 (5,257,987) | 0.1207% |
| 2006 | 5.08百万 (5,083,919) | 0.1185% |
| 2005 | 4.91百万 (4,905,668) | 0.1163% |
| 2004 | 4.69百万 (4,694,147) | 0.1132% |
| 2003 | 4.45百万 (4,452,828) | 0.1092% |
| |
| 2002 | 4.26百万 (4,259,397) | 0.1063% |
| 2001 | 4.12百万 (4,120,124) | 0.1047% |
| 2000 | 4.00百万 (3,998,960) | 0.1035% |
| 1999 | 3.87百万 (3,872,564) | 0.1020% |
| 1998 | 3.74百万 (3,744,746) | 0.1005% |
| 1997 | 3.63百万 (3,634,676) | 0.0993% |
| 1996 | 3.54百万 (3,536,116) | 0.0985% |
| 1995 | 3.37百万 (3,372,107) | 0.0956% |
| 1994 | 3.21百万 (3,206,808) | 0.0926% |
| 1993 | 3.17百万 (3,173,574) | 0.0933% |
| 1992 | 3.14百万 (3,139,719) | 0.0939% |
| 1991 | 3.00百万 (2,995,288) | 0.0911% |
| 1990 | 2.88百万 (2,882,850) | 0.0893% |
| 1989 | 2.82百万 (2,818,937) | 0.0890% |
| 1988 | 2.72百万 (2,722,250) | 0.0876% |
| 1987 | 2.62百万 (2,624,024) | 0.0862% |
| 1986 | 2.52百万 (2,520,004) | 0.0845% |
| 1985 | 2.44百万 (2,440,751) | 0.0836% |
| 1984 | 2.45百万 (2,454,552) | 0.0859% |
| 1983 | 2.46百万 (2,458,550) | 0.0880% |
| |
| 1982 | 2.30百万 (2,300,410) | 0.0842% |
| 1981 | 2.15百万 (2,151,261) | 0.0806% |
| 1980 | 2.19百万 (2,190,280) | 0.0839% |
| 1979 | 2.23百万 (2,230,278) | 0.0875% |
| 1978 | 2.20百万 (2,196,229) | 0.0882% |
| 1977 | 2.17百万 (2,174,662) | 0.0894% |
| 1976 | 2.15百万 (2,152,619) | 0.0904% |
| 1975 | 2.13百万 (2,126,960) | 0.0910% |
| 1974 | 2.10百万 (2,096,374) | 0.0915% |
| 1973 | 2.06百万 (2,061,814) | 0.0918% |
| 1972 | 2.03百万 (2,026,309) | 0.0922% |
| 1971 | 1.99百万 (1,992,474) | 0.0926% |
| 1970 | 1.96百万 (1,959,730) | 0.0932% |
| 1969 | 1.93百万 (1,927,537) | 0.0937% |
| 1968 | 1.90百万 (1,896,365) | 0.0941% |
| 1967 | 1.87百万 (1,866,137) | 0.0946% |
| 1966 | 1.84百万 (1,836,385) | 0.0951% |
| 1965 | 1.81百万 (1,805,947) | 0.0954% |
| 1964 | 1.78百万 (1,779,682) | 0.0958% |
| 1963 | 1.76百万 (1,756,002) | 0.0962% |
| 1962 | 1.73百万 (1,730,237) | 0.0964% |
| 1961 | 1.70百万 (1,704,515) | 0.0965% |
| 1960 | 1.68百万 (1,678,718) | 0.0961% |
| 1959 | 1.63百万 (1,631,135) | 0.0947% |