| Value | Category | Cases | |
|---|---|---|---|
| 1 | No difficulty | 2651665 |
98.3%
|
| 2 | Yes, some difficulty | 38465 |
1.4%
|
| 3 | Yes, a lot of difficulty | 6763 |
0.3%
|
| 4 | Cannot hear at all | 1905 |
0.1%
|
| Sysmiss | 384774 |