| Value | Category | Cases | |
|---|---|---|---|
| 1 | No difficulty | 20128 |
99.3%
|
| 2 | Yes - Some difficulty | 86 |
0.4%
|
| 3 | Yes - A lot of difficulty | 36 |
0.2%
|
| 4 | Cannot perform activity at all | 12 |
0.1%
|
| Sysmiss | 3523 |