| Value | Category | Cases | |
|---|---|---|---|
| -9 | Don't know (spontaneous) | 0 |
0%
|
| 1 | One year or less | 2 |
0.6%
|
| 2 | 1 |
0.3%
|
|
| 3 | 2 |
0.6%
|
|
| 4 | 5 |
1.6%
|
|
| 5 | 9 |
2.9%
|
|
| 6 | 12 |
3.9%
|
|
| 7 | 9 |
2.9%
|
|
| 8 | 22 |
7.1%
|
|
| 9 | 9 |
2.9%
|
|
| 10 | 36 |
11.6%
|
|
| 11 | 8 |
2.6%
|
|
| 12 | 16 |
5.1%
|
|
| 13 | 10 |
3.2%
|
|
| 14 | 8 |
2.6%
|
|
| 15 | 41 |
13.2%
|
|
| 16 | 4 |
1.3%
|
|
| 17 | 8 |
2.6%
|
|
| 18 | 3 |
1%
|
|
| 19 | 3 |
1%
|
|
| 20 | 26 |
8.4%
|
|
| 21 | 7 |
2.3%
|
|
| 22 | 4 |
1.3%
|
|
| 23 | 9 |
2.9%
|
|
| 24 | 4 |
1.3%
|
|
| 25 | 22 |
7.1%
|
|
| 26 | 4 |
1.3%
|
|
| 27 | 3 |
1%
|
|
| 28 | 3 |
1%
|
|
| 29 | 3 |
1%
|
|
| 30 | 8 |
2.6%
|
|
| 32 | 1 |
0.3%
|
|
| 33 | 1 |
0.3%
|
|
| 34 | 3 |
1%
|
|
| 35 | 1 |
0.3%
|
|
| 45 | 3 |
1%
|
|
| 49 | 1 |
0.3%
|