| Value | Category | Cases | |
|---|---|---|---|
| 1 | More than usual | 7 |
0.3%
|
| 2 | About the same | 157 |
5.7%
|
| 3 | Less than usual | 403 |
14.5%
|
| 4 | None | 0 |
0%
|
| 5 | missing | 1 |
0%
|
| 6 | Other | 0 |
0%
|
| 8 | dtk | 0 |
0%
|
| 9 | na | 2202 |
79.5%
|
| Sysmiss | 34 |