| Value | Category | Cases | |
|---|---|---|---|
| -9 | Don't know (spontaneous) | 3 |
1.9%
|
| 1 | One hour or less | 0 |
0%
|
| 2 | 1 |
0.6%
|
|
| 18 | 1 |
0.6%
|
|
| 20 | 1 |
0.6%
|
|
| 25 | 1 |
0.6%
|
|
| 28 | 1 |
0.6%
|
|
| 30 | 38 |
24.2%
|
|
| 31 | 17 |
10.8%
|
|
| 32 | 17 |
10.8%
|
|
| 33 | 8 |
5.1%
|
|
| 34 | 5 |
3.2%
|
|
| 35 | 6 |
3.8%
|
|
| 36 | 10 |
6.4%
|
|
| 37 | 7 |
4.5%
|
|
| 38 | 3 |
1.9%
|
|
| 39 | 1 |
0.6%
|
|
| 40 | 11 |
7%
|
|
| 48 | 16 |
10.2%
|
|
| 49 | 2 |
1.3%
|
|
| 50 | 1 |
0.6%
|
|
| 56 | 1 |
0.6%
|
|
| 65 | 1 |
0.6%
|
|
| 72 | 3 |
1.9%
|
|
| 112 | 1 |
0.6%
|
|
| 1460 | 1 |
0.6%
|