| Value | Category | Cases | |
|---|---|---|---|
| 1 | Never | 46 |
1.9%
|
| 2 | Once a term | 21 |
0.9%
|
| 3 | Once a month | 171 |
7.2%
|
| 4 | Once a week | 1022 |
42.9%
|
| 5 | Nearly every day | 1025 |
43.1%
|
| 98 | Other | 95 |
4%
|
| 99 | No books | 0 |
0%
|
| Sysmiss | 947 |