| Value | Category | Cases | |
|---|---|---|---|
| -9 | Don't know (spontaneous) | 1 |
0.3%
|
| 1 | One hour or less | 0 |
0%
|
| 8 | 2 |
0.7%
|
|
| 10 | 1 |
0.3%
|
|
| 12 | 2 |
0.7%
|
|
| 15 | 1 |
0.3%
|
|
| 16 | 1 |
0.3%
|
|
| 20 | 1 |
0.3%
|
|
| 24 | 1 |
0.3%
|
|
| 28 | 1 |
0.3%
|
|
| 30 | 7 |
2.4%
|
|
| 32 | 8 |
2.8%
|
|
| 35 | 9 |
3.1%
|
|
| 36 | 14 |
4.9%
|
|
| 38 | 1 |
0.3%
|
|
| 40 | 12 |
4.2%
|
|
| 42 | 6 |
2.1%
|
|
| 45 | 3 |
1%
|
|
| 48 | 23 |
8%
|
|
| 50 | 7 |
2.4%
|
|
| 52 | 6 |
2.1%
|
|
| 55 | 3 |
1%
|
|
| 56 | 4 |
1.4%
|
|
| 58 | 1 |
0.3%
|
|
| 60 | 23 |
8%
|
|
| 62 | 2 |
0.7%
|
|
| 64 | 1 |
0.3%
|
|
| 65 | 3 |
1%
|
|
| 68 | 2 |
0.7%
|
|
| 70 | 7 |
2.4%
|
|
| 72 | 3 |
1%
|
|
| 75 | 6 |
2.1%
|
|
| 80 | 16 |
5.6%
|
|
| 82 | 1 |
0.3%
|
|
| 83 | 1 |
0.3%
|
|
| 85 | 3 |
1%
|
|
| 90 | 14 |
4.9%
|
|
| 95 | 2 |
0.7%
|
|
| 96 | 4 |
1.4%
|
|
| 100 | 4 |
1.4%
|
|
| 105 | 1 |
0.3%
|
|
| 107 | 1 |
0.3%
|
|
| 110 | 3 |
1%
|
|
| 112 | 1 |
0.3%
|
|
| 120 | 17 |
5.9%
|
|
| 122 | 3 |
1%
|
|
| 125 | 1 |
0.3%
|
|
| 130 | 1 |
0.3%
|
|
| 140 | 1 |
0.3%
|
|
| 150 | 8 |
2.8%
|
|
| 160 | 3 |
1%
|
|
| 168 | 6 |
2.1%
|
|
| 180 | 1 |
0.3%
|
|
| 200 | 2 |
0.7%
|
|
| 220 | 2 |
0.7%
|
|
| 240 | 7 |
2.4%
|
|
| 250 | 1 |
0.3%
|
|
| 300 | 2 |
0.7%
|
|
| 350 | 1 |
0.3%
|
|
| 360 | 4 |
1.4%
|
|
| 400 | 1 |
0.3%
|
|
| 420 | 1 |
0.3%
|
|
| 480 | 2 |
0.7%
|
|
| 700 | 1 |
0.3%
|
|
| 720 | 4 |
1.4%
|
|
| 730 | 1 |
0.3%
|
|
| 800 | 1 |
0.3%
|
|
| 876 | 1 |
0.3%
|
|
| 1440 | 1 |
0.3%
|
|
| Sysmiss | 1146 |