| Value | Category | Cases | |
|---|---|---|---|
| 1 | 1. No difficulty | 3865159 |
89.1%
|
| 2 | 2. Some difficulty | 112321 |
2.6%
|
| 3 | 3. A lot of difficulty | 20755 |
0.5%
|
| 4 | 4. Cannot do at all | 9135 |
0.2%
|
| 5 | 5. Do not know | 5199 |
0.1%
|
| 6 | 6. Cannot yet be determined | 174413 |
4%
|
| 9 | 9. Unspecified | 150715 |
3.5%
|
| Sysmiss | 80897 |