| Value | Category | Cases | |
|---|---|---|---|
| 1 | Light | 3353 |
48.1%
|
| 2 | Medium | 742 |
10.6%
|
| 3 | Heavy | 399 |
5.7%
|
| 4 | Cannot recall | 418 |
6%
|
| 5 | None | 2059 |
29.5%
|
| Sysmiss | 515 |