| Value | Category | Cases | |
|---|---|---|---|
| -9 | Don't know (spontaneous) | 4 |
0.7%
|
| -8 | Refusal (spontaneous) | 0 |
0%
|
| 1 | One year or less | 23 |
3.8%
|
| 2 | 42 |
7%
|
|
| 3 | 36 |
6%
|
|
| 4 | 44 |
7.3%
|
|
| 5 | 61 |
10.1%
|
|
| 6 | 42 |
7%
|
|
| 7 | 35 |
5.8%
|
|
| 8 | 32 |
5.3%
|
|
| 9 | 25 |
4.2%
|
|
| 10 | 48 |
8%
|
|
| 11 | 19 |
3.2%
|
|
| 12 | 23 |
3.8%
|
|
| 13 | 16 |
2.7%
|
|
| 14 | 12 |
2%
|
|
| 15 | 32 |
5.3%
|
|
| 16 | 11 |
1.8%
|
|
| 17 | 10 |
1.7%
|
|
| 18 | 8 |
1.3%
|
|
| 19 | 12 |
2%
|
|
| 20 | 29 |
4.8%
|
|
| 21 | 3 |
0.5%
|
|
| 22 | 6 |
1%
|
|
| 23 | 4 |
0.7%
|
|
| 24 | 7 |
1.2%
|
|
| 25 | 6 |
1%
|
|
| 26 | 1 |
0.2%
|
|
| 28 | 2 |
0.3%
|
|
| 30 | 5 |
0.8%
|
|
| 32 | 1 |
0.2%
|
|
| 34 | 1 |
0.2%
|
|
| 37 | 1 |
0.2%
|