| Value | Category | Cases | |
|---|---|---|---|
| 1 | More than usual | 0 |
0%
|
| 2 | About the same | 4 |
0.2%
|
| 3 | Less than usual | 17 |
0.7%
|
| 4 | None | 0 |
0%
|
| 5 | missing | 0 |
0%
|
| 6 | Other | 0 |
0%
|
| 8 | dtk | 0 |
0%
|
| 9 | na | 2400 |
99.1%
|
| Sysmiss | 337 |