| Value | Category | Cases | |
|---|---|---|---|
| -1 | True missing | 8 |
0.1%
|
| 0 | No - No Difficulty | 5269 |
96.1%
|
| 1 | Yes - Some Difficulty | 183 |
3.3%
|
| 2 | Yes - A lot of difficulty | 19 |
0.3%
|
| 3 | Cannot do at all | 1 |
0%
|
| 99 | Refused to answer | 1 |
0%
|