| Value | Category | Cases | |
|---|---|---|---|
| -999 | 1 |
0.7%
|
|
| 1 | Primary | 19 |
13.3%
|
| 2 | Secondary | 108 |
75.5%
|
| 3 | Tertiary | 1 |
0.7%
|
| 4 | Unassigned | 14 |
9.8%
|