| Value | Category | Cases | |
|---|---|---|---|
| 1 | No difficulty | 2653772 |
98.2%
|
| 2 | Yes, some difficulty | 38720 |
1.4%
|
| 3 | Yes, a lot of difficulty | 6559 |
0.2%
|
| 4 | Cannot hear at all | 1994 |
0.1%
|
| Sysmiss | 383938 |