| Value | Category | Cases | |
|---|---|---|---|
| 0 | Less than a year | 285 |
6.3%
|
| 1 | 17 |
0.4%
|
|
| 2 | 29 |
0.6%
|
|
| 3 | 57 |
1.3%
|
|
| 4 | 90 |
2%
|
|
| 5 | 126 |
2.8%
|
|
| 6 | 292 |
6.5%
|
|
| 7 | 217 |
4.8%
|
|
| 8 | 322 |
7.1%
|
|
| 9 | 497 |
11%
|
|
| 10 | 307 |
6.8%
|
|
| 11 | 547 |
12.1%
|
|
| 12 | 746 |
16.6%
|
|
| 13 | 61 |
1.4%
|
|
| 14 | 305 |
6.8%
|
|
| 15 | 51 |
1.1%
|
|
| 16 | 503 |
11.2%
|
|
| 17 | 21 |
0.5%
|
|
| 18 | 23 |
0.5%
|
|
| 19 | 4 |
0.1%
|
|
| 20 | 3 |
0.1%
|
|
| 89 | 1 |
0%
|
|
| 98 | I do not know | 2 |
0%
|