| Value | Category | Cases | |
|---|---|---|---|
| 1 | Less than 6 months | 17 |
1.5%
|
| 2 | 6 months to one year | 14 |
1.3%
|
| 3 | 1-2 years | 110 |
9.8%
|
| 4 | 3-4 years | 87 |
7.8%
|
| 5 | 5-9 years | 167 |
14.9%
|
| 6 | 10 years and over | 724 |
64.7%
|
| 99 | No answer | 0 |
0%
|
| 777 | Since birth | 0 |
0%
|
| 888 | Do not know | 0 |
0%
|
| Sysmiss | 80 |