| Value | Category | Cases | |
|---|---|---|---|
| 1 | Did not contribute at all (better QoL is because of other factors) | 2 |
0.3%
|
| 2 | Contributed little | 4 |
0.5%
|
| 3 | Contributed somewhat | 18 |
2.3%
|
| 4 | Contributed much | 246 |
30.9%
|
| 5 | Contributed very much | 525 |
66%
|
| Sysmiss | 1900 |