| Value | Category | Cases | |
|---|---|---|---|
| 1 | 5.0 to 10.0 IS | 104 |
7.7%
|
| 2 | 10.1 to 15.0 IS | 95 |
7%
|
| 3 | 15.1 to 20.0 IS | 271 |
20%
|
| 4 | 20.1 to 25 IS | 256 |
18.9%
|
| 5 | More than 25.0 IS | 101 |
7.5%
|
| 6 | I don't know | 528 |
39%
|
| Sysmiss | 12 |