| Value | Category | Cases | |
|---|---|---|---|
| 1 | No story books | 475 |
20%
|
| 2 | 1-10 | 469 |
19.7%
|
| 3 | 11-30 | 618 |
26%
|
| 4 | 30+ | 818 |
34.4%
|
| Sysmiss | 947 |