| Value | Category | Cases | |
|---|---|---|---|
| -9 | Don't know (spontaneous) | 0 |
0%
|
| 1 | One year or less | 1 |
1%
|
| 2 | 1 |
1%
|
|
| 5 | 4 |
3.9%
|
|
| 6 | 3 |
2.9%
|
|
| 8 | 3 |
2.9%
|
|
| 9 | 1 |
1%
|
|
| 10 | 9 |
8.7%
|
|
| 11 | 2 |
1.9%
|
|
| 12 | 6 |
5.8%
|
|
| 13 | 1 |
1%
|
|
| 14 | 1 |
1%
|
|
| 15 | 4 |
3.9%
|
|
| 16 | 2 |
1.9%
|
|
| 17 | 2 |
1.9%
|
|
| 18 | 3 |
2.9%
|
|
| 19 | 2 |
1.9%
|
|
| 20 | 3 |
2.9%
|
|
| 22 | 3 |
2.9%
|
|
| 23 | 3 |
2.9%
|
|
| 25 | 7 |
6.8%
|
|
| 26 | 2 |
1.9%
|
|
| 27 | 1 |
1%
|
|
| 28 | 3 |
2.9%
|
|
| 29 | 3 |
2.9%
|
|
| 30 | 8 |
7.8%
|
|
| 33 | 2 |
1.9%
|
|
| 35 | 6 |
5.8%
|
|
| 37 | 1 |
1%
|
|
| 40 | 7 |
6.8%
|
|
| 42 | 1 |
1%
|
|
| 44 | 1 |
1%
|
|
| 45 | 2 |
1.9%
|
|
| 50 | 3 |
2.9%
|
|
| 55 | 1 |
1%
|
|
| 57 | 1 |
1%
|