| Value | Category | Cases | |
|---|---|---|---|
| 1 | Relating to other subjects | 35463 |
20.5%
|
| 2 | learning goals | 101299 |
58.6%
|
| 3 | in my sleep | 36206 |
20.9%
|
| 7 | N/A | 93158 | |
| 8 | Invalid | 793 | |
| 9 | Missing | 4404 |