| Value | Category | Cases | |
|---|---|---|---|
| 1 | NO DIFFICULTY | 12390 |
82.5%
|
| 2 | SOME DIFFICULTY | 822 |
5.5%
|
| 3 | A LOT OF DIFFICULTY | 98 |
0.7%
|
| 4 | CAN NOT WALK/CLIMB STEPS AT ALL | 10 |
0.1%
|
| Sysmiss | 1699 |
11.3%
|