| Value | Category | Cases | |
|---|---|---|---|
| 1 | 1. Yes, primary only | 521 |
2.9%
|
| 2 | 2. Yes, secondary only | 159 |
0.9%
|
| 3 | 3. Yes, both | 10 |
0.1%
|
| 4 | 4. None | 16986 |
96.1%
|
| Sysmiss | 8495 |