| Value | Category | Cases | |
|---|---|---|---|
| 0 | NONE | 338 |
9%
|
| 1 | ONE | 52 |
1.4%
|
| 2 | TWO | 222 |
5.9%
|
| 3 | THREE | 210 |
5.6%
|
| 4 | FOUR | 218 |
5.8%
|
| 5 | FIVE | 196 |
5.2%
|
| 6 | SIX | 144 |
3.8%
|
| 7 | SEVEN | 80 |
2.1%
|
| 8 | EIGHT | 49 |
1.3%
|
| 9 | NINE | 11 |
0.3%
|
| 10 | TEN OR MORE BOOKS | 673 |
17.8%
|
| Sysmiss | 1583 |
41.9%
|