| Value | Category | Cases | |
|---|---|---|---|
| 0 | NONE | 3744 |
59.7%
|
| 1 | ONE | 399 |
6.4%
|
| 2 | TWO | 601 |
9.6%
|
| 3 | THREE | 410 |
6.5%
|
| 4 | FOUR | 266 |
4.2%
|
| 5 | FIVE | 178 |
2.8%
|
| 6 | SIX | 76 |
1.2%
|
| 7 | SEVEN | 35 |
0.6%
|
| 8 | EIGHT | 33 |
0.5%
|
| 9 | NINE | 22 |
0.4%
|
| 10 | TEN OR MORE BOOKS | 329 |
5.2%
|
| Sysmiss | 176 |
2.8%
|