| Value | Category | Cases | |
|---|---|---|---|
| -9 | Don't know (spontaneous) | 115 |
11.4%
|
| 1 | One hour or less | 234 |
23.2%
|
| 2 | 3 |
0.3%
|
|
| 3 | 1 |
0.1%
|
|
| 5 | 4 |
0.4%
|
|
| 6 | 1 |
0.1%
|
|
| 8 | 2 |
0.2%
|
|
| 10 | 2 |
0.2%
|
|
| 12 | 33 |
3.3%
|
|
| 14 | 4 |
0.4%
|
|
| 15 | 27 |
2.7%
|
|
| 16 | 7 |
0.7%
|
|
| 18 | 6 |
0.6%
|
|
| 20 | 7 |
0.7%
|
|
| 21 | 1 |
0.1%
|
|
| 22 | 1 |
0.1%
|
|
| 24 | 19 |
1.9%
|
|
| 25 | 21 |
2.1%
|
|
| 26 | 2 |
0.2%
|
|
| 28 | 1 |
0.1%
|
|
| 30 | 131 |
13%
|
|
| 31 | 1 |
0.1%
|
|
| 32 | 10 |
1%
|
|
| 35 | 11 |
1.1%
|
|
| 36 | 43 |
4.3%
|
|
| 38 | 8 |
0.8%
|
|
| 40 | 23 |
2.3%
|
|
| 42 | 5 |
0.5%
|
|
| 44 | 1 |
0.1%
|
|
| 45 | 16 |
1.6%
|
|
| 46 | 1 |
0.1%
|
|
| 48 | 23 |
2.3%
|
|
| 50 | 38 |
3.8%
|
|
| 55 | 8 |
0.8%
|
|
| 56 | 1 |
0.1%
|
|
| 60 | 30 |
3%
|
|
| 63 | 1 |
0.1%
|
|
| 65 | 3 |
0.3%
|
|
| 70 | 7 |
0.7%
|
|
| 72 | 5 |
0.5%
|
|
| 75 | 1 |
0.1%
|
|
| 78 | 1 |
0.1%
|
|
| 80 | 9 |
0.9%
|
|
| 84 | 1 |
0.1%
|
|
| 85 | 1 |
0.1%
|
|
| 90 | 1 |
0.1%
|
|
| 96 | 6 |
0.6%
|
|
| 100 | 5 |
0.5%
|
|
| 110 | 1 |
0.1%
|
|
| 112 | 1 |
0.1%
|
|
| 115 | 17 |
1.7%
|
|
| 120 | 20 |
2%
|
|
| 140 | 2 |
0.2%
|
|
| 144 | 1 |
0.1%
|
|
| 145 | 1 |
0.1%
|
|
| 150 | 5 |
0.5%
|
|
| 154 | 1 |
0.1%
|
|
| 180 | 2 |
0.2%
|
|
| 200 | 5 |
0.5%
|
|
| 205 | 1 |
0.1%
|
|
| 220 | 1 |
0.1%
|
|
| 240 | 3 |
0.3%
|
|
| 250 | 21 |
2.1%
|
|
| 264 | 2 |
0.2%
|
|
| 288 | 2 |
0.2%
|
|
| 300 | 1 |
0.1%
|
|
| 335 | 1 |
0.1%
|
|
| 350 | 1 |
0.1%
|
|
| 360 | 1 |
0.1%
|
|
| 420 | 1 |
0.1%
|
|
| 450 | 1 |
0.1%
|
|
| 480 | 2 |
0.2%
|
|
| 540 | 1 |
0.1%
|
|
| 555 | 1 |
0.1%
|
|
| 590 | 18 |
1.8%
|
|
| 660 | 2 |
0.2%
|
|
| 700 | 2 |
0.2%
|
|
| 864 | 1 |
0.1%
|
|
| 900 | 1 |
0.1%
|
|
| 962 | 1 |
0.1%
|
|
| 1200 | 3 |
0.3%
|
|
| 2250 | 1 |
0.1%
|
|
| 8760 | 1 |
0.1%
|