| Value | Category | Cases | |
|---|---|---|---|
| -9 | Missing Data | 7 |
0.2%
|
| 1 | Have now | 54 |
1.4%
|
| 2 | Had in past | 31 |
0.8%
|
| 3 | Never had | 3904 |
97.7%
|
| Sysmiss | 4 |