| Value | Category | 
|---|---|
| 1 | 0 | 
| 2 | 1 | 
| 3 | 2 | 
| 4 | 3 | 
| 5 | 4 | 
| 6 | 5 | 
| 7 | 6 | 
| 8 | 7 | 
| 9 | 8 | 
| 10 | 9 | 
| 11 | 10 | 
| 12 | 11 | 
| 13 | 12 | 
| 14 | 13 | 
| 15 | 14 | 
| 16 | 15 | 
| 17 | 16 | 
| 18 | 17 | 
| 19 | 18 | 
| 20 | 19 | 
| 21 | 20 | 
| 22 | 22 | 
| 23 | 23 | 
| 24 | 24 | 
| 25 | 25 | 
| 26 | 28 | 
| 27 | 30 | 
| 28 | 32 | 
| 29 | 34 | 
| 30 | 35 | 
| 31 | 36 | 
| 32 | 38 | 
| 33 | 45 | 
| 34 | 48 | 
| 35 | 50 | 
| 36 | 98 | 
| 37 | 99 | 
| 38 | 200 | 
| 39 | Don't know | 
| 40 | Refused to answer | 
| 41 | Outlier set to missing | 
| 42 | Inconsistency set to missing | 
| 43 | Not applicable |