| Value | Category | Cases | |
|---|---|---|---|
| 0 | Less than a year | 582 |
57.3%
|
| 1 | 12 |
1.2%
|
|
| 2 | 19 |
1.9%
|
|
| 3 | 35 |
3.4%
|
|
| 4 | 47 |
4.6%
|
|
| 5 | 43 |
4.2%
|
|
| 6 | 70 |
6.9%
|
|
| 7 | 29 |
2.9%
|
|
| 8 | 11 |
1.1%
|
|
| 9 | 27 |
2.7%
|
|
| 10 | 7 |
0.7%
|
|
| 11 | 17 |
1.7%
|
|
| 12 | 48 |
4.7%
|
|
| 13 | 1 |
0.1%
|
|
| 14 | 33 |
3.3%
|
|
| 15 | 1 |
0.1%
|
|
| 16 | 25 |
2.5%
|
|
| 18 | 2 |
0.2%
|
|
| 19 | 1 |
0.1%
|
|
| 20 | 3 |
0.3%
|
|
| 98 | I do not know | 2 |
0.2%
|