| Value | Category | 
|---|---|
| -9 | Don't know | 
| -8 | Refused | 
| -5 | Not applicable | 
| -3 | Missing | 
| 10 | |
| 20 | |
| 30 | |
| 35 | |
| 40 | |
| 50 | |
| 60 | |
| 70 | |
| 100 | |
| 120 | |
| 145 | |
| 150 | |
| 180 | |
| 200 | |
| 240 | |
| 250 | |
| 260 | |
| 270 | |
| 280 | |
| 300 | |
| 350 | |
| 400 | |
| 420 | |
| 450 | |
| 500 | |
| 510 | |
| 550 | |
| 600 | |
| 650 | |
| 700 | |
| 720 | |
| 750 | |
| 800 | |
| 1000 | |
| 1150 | |
| 1200 | |
| 1400 | |
| 1500 | |
| 1700 | |
| 1800 | |
| 2000 | |
| 2400 | |
| 2500 | |
| 2600 | |
| 3000 | |
| 3500 | |
| 4000 | |
| 5000 | |
| 6000 | |
| 7000 | |
| 8000 | |
| 15000 | |
| 16000 | |
| Sysmiss |