| Value | Category | Cases | |
|---|---|---|---|
| 1 | Less than 1 year | 217 |
15.8%
|
| 2 | 1-2 years | 255 |
18.6%
|
| 3 | 3-5 years | 222 |
16.2%
|
| 4 | Above 5 years | 641 |
46.8%
|
| 5 | Since birth | 36 |
2.6%
|
| Sysmiss | 3 |