| Value | Category | Cases | |
|---|---|---|---|
| 0 | 35 |
87.5%
|
|
| 2 | 1 |
2.5%
|
|
| 7 | 1 |
2.5%
|
|
| 20 | 1 |
2.5%
|
|
| 30 | 1 |
2.5%
|
|
| 77 | refuse | 0 |
0%
|
| 88 | dont know | 0 |
0%
|
| 99 | missing | 0 |
0%
|
| 160 | 1 |
2.5%
|
|
| Sysmiss | 4930 |