| Value | Category | Cases | |
|---|---|---|---|
| -9 | Not in universe | 30 |
2.6%
|
| 1 | Standing | 1104 |
95.6%
|
| 2 | Recumbent | 21 |
1.8%
|
| 9995 | Missing | 0 |
0%
|
| Sysmiss | 1 |