| Value | Category | Cases | |
|---|---|---|---|
| 0 | 1 |
0.4%
|
|
| 1 | 47 |
18.4%
|
|
| 2 | 59 |
23.1%
|
|
| 3 | 45 |
17.6%
|
|
| 4 | 43 |
16.9%
|
|
| 5 | 16 |
6.3%
|
|
| 6 | 21 |
8.2%
|
|
| 7 | 1 |
0.4%
|
|
| 8 | 16 |
6.3%
|
|
| 77 | Don't know | 6 |
2.4%
|
| Sysmiss | 2017 |