Bulgária - Pirâmide etária
| Data | 0-14 anos % | 15-64 anos % | > 64 anos % |
|---|---|---|---|
| 1975 | 22,26% | 66,73% | 11,01% |
| 1974 | 22,26% | 67,04% | 10,70% |
| 1973 | 22,23% | 67,27% | 10,49% |
| 1972 | 22,33% | 67,43% | 10,25% |
| 1971 | 22,50% | 67,49% | 10,00% |
| 1970 | 22,72% | 67,55% | 9,73% |
| 1969 | 22,93% | 67,62% | 9,45% |
| 1968 | 23,08% | 67,71% | 9,21% |
| 1967 | 23,27% | 67,76% | 8,97% |
| 1966 | 23,62% | 67,63% | 8,75% |
| 1965 | 23,95% | 67,51% | 8,54% |
| 1964 | 24,45% | 67,33% | 8,21% |
| 1963 | 24,87% | 67,04% | 8,09% |
| 1962 | 25,29% | 66,80% | 7,91% |
| 1961 | 25,57% | 66,61% | 7,82% |
| 1960 | 25,98% | 66,45% | 7,58% |
| 1959 | 26,16% | 66,39% | 7,44% |