Bulgária - Natalidade
| Data | Nascidos vivos | Nascidos - homens | Nascidos - mulheres | Taxa de natalidade | Taxa de fertilidade |
|---|---|---|---|---|---|
| 1975 | 144.668 | 74.400 | 70.300 | 16,60‰ | 2,23 |
| 1974 | 149.196 | 76.700 | 72.500 | 17,20‰ | 2,29 |
| 1973 | 139.713 | 71.700 | 68.100 | 16,20‰ | 2,15 |
| 1972 | 131.316 | 67.800 | 63.500 | 15,30‰ | 2,03 |
| 1971 | 135.422 | 69.800 | 65.600 | 15,90‰ | 2,10 |
| 1970 | 138.745 | 71.800 | 66.900 | 16,30‰ | 2,17 |
| 1969 | 143.060 | 73.500 | 69.600 | 17,00‰ | 2,27 |
| 1968 | 141.460 | 72.600 | 68.800 | 16,90‰ | 2,27 |
| 1967 | 124.582 | 64.200 | 60.400 | 15,00‰ | 2,02 |
| 1966 | 123.039 | 63.500 | 59.600 | 14,90‰ | 2,03 |
| 1965 | 125.791 | 64.800 | 61.000 | 15,30‰ | 2,09 |
| 1964 | 130.958 | 67.400 | 63.500 | 16,10‰ | 2,19 |
| 1963 | 132.143 | 68.000 | 64.100 | 16,40‰ | 2,21 |
| 1962 | 134.148 | 68.800 | 65.300 | 16,70‰ | 2,24 |
| 1961 | 137.861 | 71.200 | 66.600 | 17,40‰ | 2,29 |
| 1960 | 140.082 | 72.200 | 67.900 | 17,80‰ | 2,31 |