| Value | Category | Cases | |
|---|---|---|---|
| 1 | Yes, primary only | 414 |
4.6%
|
| 2 | Yes,secondary only | 306 |
3.4%
|
| 3 | Yes, both | 23 |
0.3%
|
| 4 | None | 8350 |
91.8%
|
| Sysmiss | 14233 |