| Value | Category | 
|---|---|
| -9 | Don't know | 
| -8 | Refusal | 
| -7 | Does not apply | 
| 18 | |
| 20 | |
| 25 | |
| 26 | |
| 28 | |
| 30 | |
| 33 | |
| 34 | |
| 35 | |
| 40 | |
| 42 | |
| 45 | |
| 47 | |
| 50 | |
| 55 | |
| 60 | |
| 62 | |
| 70 | |
| 80 | |
| 90 | |
| 98 | |
| 100 | |
| 110 | |
| 120 | |
| 140 | |
| 160 | |
| 200 | |
| 230 | |
| 250 | |
| 280 | |
| 300 | |
| 320 | |
| 330 | |
| 350 | |
| 360 | |
| 400 | |
| 420 | |
| 430 | |
| 432 | |
| 450 | |
| 500 | |
| 586 | |
| 600 | |
| 687 | |
| 800 | |
| 812 | |
| 1000 | |
| 1200 | |
| 1503 | |
| 2000 | |
| 3000 | |
| 4000 | |
| 4800 | |
| 8000 | |
| 20000 | |
| Sysmiss |