| Value | Category | Cases | |
|---|---|---|---|
| 1 | No difficulty | 19971 |
98.5%
|
| 2 | Yes - Some difficulty | 216 |
1.1%
|
| 3 | Yes - A lot of difficulty | 63 |
0.3%
|
| 4 | Cannot perform activity at all | 18 |
0.1%
|
| Sysmiss | 3517 |