| Value | Category | Cases | |
|---|---|---|---|
| 0 | NONE | 545 |
77.5%
|
| 1 | ONE | 12 |
1.7%
|
| 2 | TWO | 17 |
2.4%
|
| 3 | THREE | 14 |
2%
|
| 4 | FOUR | 14 |
2%
|
| 5 | FIVE | 7 |
1%
|
| 6 | SIX | 8 |
1.1%
|
| 7 | SEVEN | 3 |
0.4%
|
| 8 | EIGHT | 3 |
0.4%
|
| 9 | NINE | 2 |
0.3%
|
| 10 | TEN OR MORE BOOKS | 47 |
6.7%
|
| Sysmiss | 31 |
4.4%
|