Chade - Pirâmide etária
| Data | 0-14 anos % | 15-64 anos % | > 64 anos % |
|---|---|---|---|
| 1974 | 43,79% | 52,40% | 3,80% |
| 1973 | 43,48% | 52,69% | 3,83% |
| 1972 | 43,16% | 52,98% | 3,86% |
| 1971 | 42,88% | 53,24% | 3,88% |
| 1970 | 42,66% | 53,44% | 3,90% |
| 1969 | 42,47% | 53,61% | 3,92% |
| 1968 | 42,30% | 53,77% | 3,93% |
| 1967 | 42,14% | 53,91% | 3,95% |
| 1966 | 42,01% | 54,03% | 3,96% |
| 1965 | 41,90% | 54,13% | 3,97% |
| 1964 | 41,65% | 54,37% | 3,98% |
| 1963 | 41,32% | 54,70% | 3,98% |
| 1962 | 41,06% | 54,96% | 3,98% |
| 1961 | 40,81% | 55,20% | 3,98% |
| 1960 | 40,58% | 55,43% | 4,00% |