| Value | Category | Cases | |
|---|---|---|---|
| 1 | More than usual | 4 |
0.1%
|
| 2 | About the same | 150 |
4.5%
|
| 3 | Less than usual | 236 |
7%
|
| 4 | None | 0 |
0%
|
| 5 | missing | 0 |
0%
|
| 6 | Other | 0 |
0%
|
| 8 | dtk | 0 |
0%
|
| 9 | na | 2972 |
88.4%
|
| Sysmiss | 1274 |