| Value | Category | Cases | |
|---|---|---|---|
| 1 | No books | 593 |
24.2%
|
| 2 | 1-5 books | 1265 |
51.5%
|
| 3 | 6-10 books | 390 |
15.9%
|
| 4 | 11-25 books | 121 |
4.9%
|
| 5 | >25 books | 86 |
3.5%
|
| Sysmiss | 872 |