| Value | Category | 
|---|---|
| -9 | Don't know | 
| -8 | Refused | 
| -5 | Not Applicable | 
| -3 | Missing | 
| 3 | |
| 6 | |
| 7 | |
| 8 | |
| 12 | |
| 13 | |
| 28 | |
| 30 | |
| 32 | |
| 34 | |
| 35 | |
| 38 | |
| 49 | |
| 90 | |
| 100 | |
| 120 | |
| 130 | |
| 140 | |
| 150 | |
| 200 | |
| 250 | |
| 270 | |
| 278 | |
| 360 | |
| 450 | |
| 500 | |
| 600 | |
| 680 | |
| 700 | |
| 757 | |
| 800 | |
| 820 | |
| 840 | |
| 850 | |
| 880 | |
| 1000 | |
| 1100 | |
| 1200 | |
| 1300 | |
| 1400 | |
| 1500 | |
| 1900 | |
| 2000 | |
| 2200 | |
| 2500 | |
| 2800 | |
| 3000 | |
| 3500 | |
| 4300 | |
| 5000 | |
| 6000 | |
| 9000 | |
| Sysmiss |