| Value | Category | Cases | |
|---|---|---|---|
| 0 | 380 |
21.9%
|
|
| 1 | 241 |
13.9%
|
|
| 2 | 56 |
3.2%
|
|
| 3 | 34 |
2%
|
|
| 4 | 12 |
0.7%
|
|
| 5 | 29 |
1.7%
|
|
| 6 | 8 |
0.5%
|
|
| 7 | 3 |
0.2%
|
|
| 8 | 9 |
0.5%
|
|
| 9 | 1 |
0.1%
|
|
| 10 | 13 |
0.7%
|
|
| 11 | 4 |
0.2%
|
|
| 12 | 3 |
0.2%
|
|
| 13 | 2 |
0.1%
|
|
| 15 | 1 |
0.1%
|
|
| 20 | 13 |
0.7%
|
|
| 23 | 1 |
0.1%
|
|
| 24 | 2 |
0.1%
|
|
| 25 | 2 |
0.1%
|
|
| 26 | 1 |
0.1%
|
|
| 29 | 1 |
0.1%
|
|
| 30 | 1 |
0.1%
|
|
| 32 | 1 |
0.1%
|
|
| 40 | 2 |
0.1%
|
|
| 59 | 1 |
0.1%
|
|
| 60 | 2 |
0.1%
|
|
| 62 | 1 |
0.1%
|
|
| 70 | 2 |
0.1%
|
|
| 97 | 1 |
0.1%
|
|
| 98 | 1 |
0.1%
|
|
| 100 | 4 |
0.2%
|
|
| 999 | No textbook | 906 |
52.1%
|