| Value | Category |
|---|---|
| -9 | Don't know (spontaneous) |
| -8 | Refusal (spontaneous) |
| -7 | Does not apply |
| 0 | |
| 1 | |
| 2 | |
| 3 | |
| 4 | |
| 5 | |
| 6 | |
| 7 | |
| 8 | |
| 9 | |
| 10 | |
| 11 | |
| 12 | |
| 13 | |
| 14 | |
| 15 | |
| 17 | |
| 18 | |
| 19 | |
| 20 | |
| 21 | |
| 22 | |
| 23 | |
| 24 | |
| 25 | |
| 27 | |
| 30 | |
| 31 | |
| 32 | |
| 33 | |
| 35 | |
| 40 | |
| 45 | |
| 46 | |
| 50 | |
| 51 | |
| 55 | |
| 56 | |
| 60 | |
| 65 | |
| 76 | |
| 80 | |
| 90 | |
| 100 | |
| 105 | |
| 112 | |
| 120 | |
| 122 | |
| 123 | |
| 165 | |
| 170 | |
| 200 | |
| 218 | |
| 250 | |
| 350 | |
| 2002 | |
| Sysmiss |