| Value | Category | Cases | |
|---|---|---|---|
| 1 | 1. No difficulty | 833282 |
54.9%
|
| 2 | 2. Some difficulty | 185775 |
12.2%
|
| 3 | 3. A lot of difficulty | 93077 |
6.1%
|
| 4 | 4. Unable to do | 163477 |
10.8%
|
| 5 | 5. Do not know | 30639 |
2%
|
| 9 | 9. Unspecified | 211523 |
13.9%
|
| Sysmiss | 2900821 |