| Age groups | The supplementary questionnaire was | Total | The supplementary questionnaire was | Total | ||
|---|---|---|---|---|---|---|
| answered | not answered | answered | not answered | |||
| thousand persons | % | |||||
| Total | ||||||
| 15–19 | 462.6 | 13.2 | 475.9 | 97.2 | 2.8 | 100.0 |
| 20–24 | 518.9 | 22.8 | 541.6 | 95.8 | 4.2 | 100.0 |
| 25–29 | 570.4 | 40.1 | 610.5 | 93.4 | 6.6 | 100.0 |
| Total | 1 551.9 | 76.1 | 1 628.0 | 95.3 | 4.7 | 100.0 |
| Male | ||||||
| 15–19 | 236.6 | 6.9 | 243.6 | 97.2 | 2.8 | 100.0 |
| 20–24 | 264.8 | 12.4 | 277.3 | 95.5 | 4.5 | 100.0 |
| 25–29 | 292.9 | 20.7 | 313.5 | 93.4 | 6.6 | 100.0 |
| Total | 794.3 | 40.0 | 834.4 | 95.2 | 4.8 | 100.0 |
| Female | ||||||
| 15–19 | 226.0 | 6.3 | 232.3 | 97.3 | 2.7 | 100.0 |
| 20–24 | 254.0 | 10.4 | 264.4 | 96.1 | 3.9 | 100.0 |
| 25–29 | 277.6 | 19.4 | 297.0 | 93.5 | 6.5 | 100.0 |
| Total | 757.6 | 36.1 | 793.7 | 95.5 | 4.5 | 100.0 |