| Value | Category |
|---|---|
| -9 | Don't know |
| -8 | Refusal |
| -7 | Does not apply |
| 0 | |
| 1 | |
| 2 | |
| 3 | |
| 4 | |
| 5 | |
| 6 | |
| 7 | |
| 8 | |
| 9 | |
| 10 | |
| 11 | |
| 12 | |
| 13 | |
| 14 | |
| 15 | |
| 16 | |
| 17 | |
| 18 | |
| 19 | |
| 20 | |
| 22 | |
| 23 | |
| 25 | |
| 26 | |
| 27 | |
| 29 | |
| 30 | |
| 35 | |
| 36 | |
| 38 | |
| 40 | |
| 43 | |
| 45 | |
| 48 | |
| 50 | |
| 57 | |
| 58 | |
| 60 | |
| 65 | |
| 70 | |
| 75 | |
| 80 | |
| 90 | |
| 98 | |
| 100 | |
| 102 | |
| 109 | |
| 110 | |
| 120 | |
| 130 | |
| 150 | |
| 159 | |
| 180 | |
| 200 | |
| 203 | |
| 225 | |
| 250 | |
| 260 | |
| 300 | |
| 360 | |
| 374 | |
| 380 | |
| 400 | |
| 480 | |
| 500 | |
| 540 | |
| 607 | |
| 750 | |
| 800 | |
| 805 | |
| 1000 | |
| 1077 | |
| Sysmiss |