| Value | Category | Cases | |
|---|---|---|---|
| -9 | Don't know (spontaneous) | 0 |
0%
|
| 0 | 105 |
69.5%
|
|
| 1 | One minute or less | 0 |
0%
|
| 9 | 1 |
0.7%
|
|
| 18 | 1 |
0.7%
|
|
| 20 | 2 |
1.3%
|
|
| 24 | 1 |
0.7%
|
|
| 30 | 20 |
13.2%
|
|
| 45 | 2 |
1.3%
|
|
| 50 | 1 |
0.7%
|
|
| NA | 18 |
11.9%
|