| Value | Category | Cases | |
|---|---|---|---|
| 1 | yes, primary only | 36 |
8%
|
| 2 | yes, secondary only | 14 |
3.1%
|
| 3 | yes, both | 3 |
0.7%
|
| 4 | none | 397 |
88.2%
|
| Sysmiss | 18139 |