| Value | Category |
|---|---|
| 2 | 1 |
| 3 | 2 |
| 4 | 3 |
| 5 | 4 |
| 6 | 5 |
| 7 | 6 |
| 8 | 8 |
| 9 | 9 |
| 10 | 10 |
| 11 | 11 |
| 12 | 12 |
| 13 | 14 |
| 14 | 16 |
| 15 | 20 |
| 16 | 24 |
| 17 | 25 |
| 18 | 28 |
| 19 | 30 |
| 20 | 32 |
| 21 | 34 |
| 22 | 35 |
| 23 | 36 |
| 24 | 37 |
| 25 | 40 |
| 26 | 42 |
| 27 | 48 |
| 28 | 49 |
| 29 | 50 |
| 30 | 52 |
| 31 | 54 |
| 32 | 56 |
| 33 | 58 |
| 34 | 60 |
| 35 | 62 |
| 36 | 63 |
| 37 | 66 |
| 38 | 70 |
| 39 | 72 |
| 40 | 77 |
| 41 | 78 |
| 42 | 84 |
| 43 | 88 |
| 44 | 140 |
| 45 | 150 |
| 46 | 160 |
| 47 | Don't know |
| 48 | Refused to answer |
| 49 | Outlier set to missing |
| 50 | Inconsistency set to missing |
| 51 | Not applicable |