| Value | Category | Cases | |
|---|---|---|---|
| 1 | No difficulty | 12554 |
98.3%
|
| 2 | Yes - some difficulty | 192 |
1.5%
|
| 3 | Yes - a lot of difficulty | 18 |
0.1%
|
| 4 | Cannot perform activity at all | 4 |
0%
|
| Sysmiss | 2829 |