| Value | Category | Cases | |
|---|---|---|---|
| 1 | Did not attend | 76 |
9.9%
|
| 2 | Less than 1 year | 24 |
3.1%
|
| 3 | 1 year | 119 |
15.5%
|
| 4 | 2 years | 156 |
20.3%
|
| 5 | 3 years | 214 |
27.8%
|
| 6 | 4 years or more | 181 |
23.5%
|
| Sysmiss | 230 |