| Period between the first consumption and the first symptoms | Unknown | <1 | 1 | 2 | 3 | 4 | 5 | 6 | 7 | 13 | After | Total | |
| Age (years) | |||||||||||||
| 17 | 1 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 1 | |
| 18 | 3 | 2 | 1 | 1 | 0 | 1 | 0 | 0 | 0 | 0 | 0 | 8 | |
| 19 | 1 | 2 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 1 | 4 | |
| 20 | 8 | 2 | 3 | 1 | 1 | 0 | 0 | 2 | 0 | 1 | 0 | 18 | |
| 21 | 5 | 1 | 1 | 2 | 1 | 0 | 1 | 0 | 1 | 0 | 0 | 12 | |
| Total | 18 | 7 | 5 | 4 | 2 | 1 | 1 | 2 | 1 | 1 | 1 | 43 |