| Value | Category | Cases | |
|---|---|---|---|
| 0 | None | 5865 |
83.7%
|
| 1 | 180 |
2.6%
|
|
| 2 | 162 |
2.3%
|
|
| 3 | 232 |
3.3%
|
|
| 4 | 54 |
0.8%
|
|
| 5 | 29 |
0.4%
|
|
| 6 | 31 |
0.4%
|
|
| 7 | 12 |
0.2%
|
|
| 8 | 4 |
0.1%
|
|
| 9 | 4 |
0.1%
|
|
| 10 | Ten or more books | 64 |
0.9%
|
| Sysmiss | 368 |
5.3%
|