| Value | Category | Cases | |
|---|---|---|---|
| 0 | NONE | 290 |
19.6%
|
| 1 | ONE | 23 |
1.6%
|
| 2 | TWO | 23 |
1.6%
|
| 3 | THREE | 45 |
3%
|
| 4 | FOUR | 27 |
1.8%
|
| 5 | FIVE | 33 |
2.2%
|
| 6 | SIX | 27 |
1.8%
|
| 7 | SEVEN | 22 |
1.5%
|
| 8 | EIGHT | 13 |
0.9%
|
| 9 | NINE | 25 |
1.7%
|
| 10 | TEN OR MORE BOOKS | 285 |
19.3%
|
| Sysmiss | 666 |
45%
|