| Value | Category | Cases | |
|---|---|---|---|
| -9 | Don't know (spontaneous) | 17 |
11.3%
|
| 1 | One year or less | 1 |
0.7%
|
| 2 | 11 |
7.3%
|
|
| 3 | 8 |
5.3%
|
|
| 4 | 12 |
7.9%
|
|
| 5 | 13 |
8.6%
|
|
| 6 | 8 |
5.3%
|
|
| 7 | 7 |
4.6%
|
|
| 8 | 3 |
2%
|
|
| 9 | 4 |
2.6%
|
|
| 10 | 12 |
7.9%
|
|
| 11 | 6 |
4%
|
|
| 12 | 3 |
2%
|
|
| 13 | 2 |
1.3%
|
|
| 14 | 1 |
0.7%
|
|
| 15 | 8 |
5.3%
|
|
| 16 | 5 |
3.3%
|
|
| 17 | 2 |
1.3%
|
|
| 18 | 2 |
1.3%
|
|
| 20 | 8 |
5.3%
|
|
| 21 | 2 |
1.3%
|
|
| 22 | 1 |
0.7%
|
|
| 23 | 5 |
3.3%
|
|
| 25 | 4 |
2.6%
|
|
| 30 | 2 |
1.3%
|
|
| 40 | 2 |
1.3%
|
|
| 43 | 1 |
0.7%
|
|
| 50 | 1 |
0.7%
|