| Value | Category | Cases | |
|---|---|---|---|
| 1 | NO DIFFICULTY | 744 |
94.9%
|
| 2 | SOME DIFFICULTY | 18 |
2.3%
|
| 3 | A LOT OF DIFFICULTY | 1 |
0.1%
|
| 4 | CANNOT HEART AT ALL | 1 |
0.1%
|
| Sysmiss | 20 |
2.6%
|