| Value | Category | Cases | |
|---|---|---|---|
| -9 | Don't know (spontaneous) | 74 |
19.5%
|
| 1 | One hour or less | 8 |
2.1%
|
| 2 | 2 |
0.5%
|
|
| 3 | 1 |
0.3%
|
|
| 8 | 2 |
0.5%
|
|
| 10 | 4 |
1.1%
|
|
| 12 | 3 |
0.8%
|
|
| 15 | 4 |
1.1%
|
|
| 16 | 1 |
0.3%
|
|
| 20 | 8 |
2.1%
|
|
| 22 | 1 |
0.3%
|
|
| 24 | 6 |
1.6%
|
|
| 25 | 2 |
0.5%
|
|
| 30 | 52 |
13.7%
|
|
| 32 | 7 |
1.8%
|
|
| 35 | 12 |
3.2%
|
|
| 36 | 5 |
1.3%
|
|
| 40 | 24 |
6.3%
|
|
| 48 | 1 |
0.3%
|
|
| 50 | 15 |
3.9%
|
|
| 60 | 23 |
6.1%
|
|
| 70 | 2 |
0.5%
|
|
| 72 | 1 |
0.3%
|
|
| 80 | 24 |
6.3%
|
|
| 90 | 1 |
0.3%
|
|
| 95 | 1 |
0.3%
|
|
| 100 | 26 |
6.8%
|
|
| 120 | 9 |
2.4%
|
|
| 125 | 1 |
0.3%
|
|
| 130 | 2 |
0.5%
|
|
| 140 | 1 |
0.3%
|
|
| 150 | 7 |
1.8%
|
|
| 160 | 7 |
1.8%
|
|
| 196 | 1 |
0.3%
|
|
| 200 | 10 |
2.6%
|
|
| 240 | 1 |
0.3%
|
|
| 250 | 4 |
1.1%
|
|
| 300 | 3 |
0.8%
|
|
| 360 | 1 |
0.3%
|
|
| 384 | 1 |
0.3%
|
|
| 400 | 1 |
0.3%
|
|
| 480 | 2 |
0.5%
|
|
| 500 | 2 |
0.5%
|
|
| 520 | 1 |
0.3%
|
|
| 600 | 3 |
0.8%
|
|
| 800 | 1 |
0.3%
|
|
| 840 | 1 |
0.3%
|
|
| 1200 | 1 |
0.3%
|
|
| 1400 | 1 |
0.3%
|
|
| 1440 | 2 |
0.5%
|
|
| 1500 | 2 |
0.5%
|
|
| 1680 | 1 |
0.3%
|
|
| 2000 | 3 |
0.8%
|
|
| 4000 | 1 |
0.3%
|
|
| Sysmiss | 330 |