| Value | Category | Cases | |
|---|---|---|---|
| -9 | Don't know (spontaneous) | 129 |
21.5%
|
| 1 | One hour or less | 11 |
1.8%
|
| 2 | 2 |
0.3%
|
|
| 3 | 1 |
0.2%
|
|
| 4 | 1 |
0.2%
|
|
| 5 | 1 |
0.2%
|
|
| 6 | 2 |
0.3%
|
|
| 8 | 2 |
0.3%
|
|
| 10 | 12 |
2%
|
|
| 12 | 15 |
2.5%
|
|
| 14 | 1 |
0.2%
|
|
| 15 | 4 |
0.7%
|
|
| 16 | 1 |
0.2%
|
|
| 20 | 17 |
2.8%
|
|
| 24 | 8 |
1.3%
|
|
| 25 | 4 |
0.7%
|
|
| 30 | 23 |
3.8%
|
|
| 33 | 1 |
0.2%
|
|
| 35 | 1 |
0.2%
|
|
| 36 | 2 |
0.3%
|
|
| 40 | 33 |
5.5%
|
|
| 44 | 1 |
0.2%
|
|
| 45 | 1 |
0.2%
|
|
| 48 | 4 |
0.7%
|
|
| 50 | 26 |
4.3%
|
|
| 52 | 3 |
0.5%
|
|
| 60 | 14 |
2.3%
|
|
| 70 | 5 |
0.8%
|
|
| 72 | 1 |
0.2%
|
|
| 75 | 1 |
0.2%
|
|
| 80 | 20 |
3.3%
|
|
| 90 | 3 |
0.5%
|
|
| 100 | 67 |
11.2%
|
|
| 104 | 1 |
0.2%
|
|
| 110 | 16 |
2.7%
|
|
| 120 | 27 |
4.5%
|
|
| 130 | 9 |
1.5%
|
|
| 150 | 18 |
3%
|
|
| 156 | 1 |
0.2%
|
|
| 160 | 6 |
1%
|
|
| 175 | 1 |
0.2%
|
|
| 176 | 2 |
0.3%
|
|
| 180 | 3 |
0.5%
|
|
| 200 | 25 |
4.2%
|
|
| 208 | 2 |
0.3%
|
|
| 234 | 1 |
0.2%
|
|
| 240 | 4 |
0.7%
|
|
| 250 | 12 |
2%
|
|
| 268 | 1 |
0.2%
|
|
| 300 | 7 |
1.2%
|
|
| 350 | 1 |
0.2%
|
|
| 384 | 1 |
0.2%
|
|
| 400 | 8 |
1.3%
|
|
| 480 | 1 |
0.2%
|
|
| 500 | 5 |
0.8%
|
|
| 640 | 1 |
0.2%
|
|
| 700 | 1 |
0.2%
|
|
| 720 | 1 |
0.2%
|
|
| 780 | 1 |
0.2%
|
|
| 800 | 6 |
1%
|
|
| 880 | 1 |
0.2%
|
|
| 900 | 1 |
0.2%
|
|
| 1000 | 4 |
0.7%
|
|
| 1200 | 2 |
0.3%
|
|
| 1300 | 1 |
0.2%
|
|
| 1400 | 1 |
0.2%
|
|
| 1500 | 2 |
0.3%
|
|
| 1700 | 1 |
0.2%
|
|
| 1760 | 1 |
0.2%
|
|
| 1840 | 1 |
0.2%
|
|
| 1900 | 1 |
0.2%
|
|
| 2000 | 3 |
0.5%
|
|
| 2400 | 1 |
0.2%
|
|
| 4500 | 1 |
0.2%
|