| Value | Category | Cases | |
|---|---|---|---|
| 0 | NONE | 358 |
45.7%
|
| 1 | ONE | 18 |
2.3%
|
| 2 | TWO | 13 |
1.7%
|
| 3 | THREE | 20 |
2.6%
|
| 4 | FOUR | 14 |
1.8%
|
| 5 | FIVE | 4 |
0.5%
|
| 6 | SIX | 4 |
0.5%
|
| 7 | SEVEN | 2 |
0.3%
|
| 8 | EIGHT | 1 |
0.1%
|
| 10 | TEN OR MORE BOOKS | 24 |
3.1%
|
| Sysmiss | 326 |
41.6%
|