| Value | Category | Cases | |
|---|---|---|---|
| 0 | None | 2520 |
70.7%
|
| 1 | One | 738 |
20.7%
|
| 2 | Two | 247 |
6.9%
|
| 3 | Three or more | 57 |
1.6%
|
| Sysmiss | 43789 |