| Value | Category | Cases | |
|---|---|---|---|
| -9 | Don't know (spontaneous) | 93 |
25.3%
|
| 1 | One hour or less | 122 |
33.2%
|
| 2 | 6 |
1.6%
|
|
| 3 | 10 |
2.7%
|
|
| 4 | 3 |
0.8%
|
|
| 5 | 12 |
3.3%
|
|
| 6 | 5 |
1.4%
|
|
| 7 | 2 |
0.5%
|
|
| 8 | 5 |
1.4%
|
|
| 9 | 1 |
0.3%
|
|
| 10 | 6 |
1.6%
|
|
| 12 | 2 |
0.5%
|
|
| 13 | 1 |
0.3%
|
|
| 15 | 4 |
1.1%
|
|
| 16 | 1 |
0.3%
|
|
| 17 | 2 |
0.5%
|
|
| 18 | 1 |
0.3%
|
|
| 20 | 5 |
1.4%
|
|
| 21 | 2 |
0.5%
|
|
| 22 | 2 |
0.5%
|
|
| 24 | 5 |
1.4%
|
|
| 25 | 3 |
0.8%
|
|
| 30 | 21 |
5.7%
|
|
| 34 | 1 |
0.3%
|
|
| 35 | 1 |
0.3%
|
|
| 40 | 8 |
2.2%
|
|
| 45 | 4 |
1.1%
|
|
| 48 | 3 |
0.8%
|
|
| 50 | 2 |
0.5%
|
|
| 60 | 7 |
1.9%
|
|
| 65 | 2 |
0.5%
|
|
| 70 | 2 |
0.5%
|
|
| 72 | 2 |
0.5%
|
|
| 80 | 1 |
0.3%
|
|
| 90 | 7 |
1.9%
|
|
| 100 | 2 |
0.5%
|
|
| 120 | 4 |
1.1%
|
|
| 130 | 2 |
0.5%
|
|
| 168 | 2 |
0.5%
|
|
| 200 | 1 |
0.3%
|
|
| 240 | 1 |
0.3%
|
|
| 500 | 2 |
0.5%
|