| Value | Category | Cases | |
|---|---|---|---|
| -99 | Do not know | 0 |
0%
|
| 1 | One | 81 |
16.4%
|
| 2 | Two | 411 |
83.2%
|
| 3 | More than two | 2 |
0.4%
|
| Sysmiss | 319 |