| Age group | Several times/day | Once/day | 2 - 3 times/week | Occasionally ≥ once/month | Occasionally < monthly | Total |
|
| Number (%) | Number (%) | Number (%) | Number (%) | Number (%) | Number (%) |
| 20 - 35 years | 6 (2.4) | 14 (5.6) | 5 (2.0) | 36 (14.4) | 3 (1.2) | 64 (25.6) |
| 36 - 50 years | 22 (8.8) | 10 (4.0) | 26 (10.4) | 40 (16.0) | 0 | 98 (39.2) |
| 51 - 65 years | 31 (12.4) | 12 (4.8) | 27 (10.8) | 18 (7.2) | 0 | 88 (35.2) |
|
| 59 (23.6) | 36 (14.4) | 58 (23.2) | 94 (37.6) | 3 (1.2) | 250 (100) |