| Value | Category | Cases | |
|---|---|---|---|
| 1 | 1. No difficulty | 19695 |
96.3%
|
| 2 | 2. Some difficulty | 557 |
2.7%
|
| 3 | 3. A lot of difficulty | 171 |
0.8%
|
| 4 | 4. Cannot do at all | 23 |
0.1%
|
| 5 | 6. Don't know | 13 |
0.1%
|
| Missing value | 4502 |