| Value | Category | Cases | |
|---|---|---|---|
| 1 | Once | 276 |
19%
|
| 2 | Twice | 244 |
16.8%
|
| 3 | Thrice | 172 |
11.8%
|
| 4 | >3 times | 238 |
16.4%
|
| 9 | NA | 518 |
35.7%
|
| 999 | 4 |
0.3%
|
|
| Sysmiss | 286 |