| Value | Category | Cases | |
|---|---|---|---|
| 0 | 0. NONE | 6405 |
55.4%
|
| 1 | 1. PRIMARY | 4430 |
38.3%
|
| 2 | 2. SECONDARY | 546 |
4.7%
|
| 3 | 3. TERTIARY | 189 |
1.6%
|
| Sysmiss | 12881 |