| Value | Category | Cases | |
|---|---|---|---|
| 1 | more than 30 minutes | 3 |
0.1%
|
| 2 | v.r.: exactly 30 minutes | 0 |
0%
|
| 3 | less than 30 minutes | 1 |
0%
|
| 98 | don't know | 4 |
0.1%
|
| Missing value | 3050 |
99.7%
|