| Value | Category | Cases | |
|---|---|---|---|
| 1 | 1 year or younger | 18687 |
4.3%
|
| 2 | 2 years | 51502 |
12%
|
| 3 | 3 years | 132518 |
30.8%
|
| 4 | 4 years | 77599 |
18.1%
|
| 5 | 5 years | 52407 |
12.2%
|
| 6 | 6 years or older | 21174 |
4.9%
|
| 7 | I did not attend |
20131 |
4.7%
|
| 8 | I do not remember | 55889 |
13%
|
| 95 | Valid Skip | 0 | |
| 96 | Not Reached | 0 | |
| 97 | Not Applicable | 72104 | |
| 98 | Invalid | 13 | |
| 99 | No Response | 5420 | |
| Sysmiss | 11890 |