| Value | Category | Cases | |
|---|---|---|---|
| 0 | 337 |
19.4%
|
|
| 1 | 281 |
16.2%
|
|
| 2 | 67 |
3.9%
|
|
| 3 | 30 |
1.7%
|
|
| 4 | 9 |
0.5%
|
|
| 5 | 21 |
1.2%
|
|
| 6 | 10 |
0.6%
|
|
| 7 | 2 |
0.1%
|
|
| 8 | 10 |
0.6%
|
|
| 9 | 4 |
0.2%
|
|
| 10 | 13 |
0.7%
|
|
| 14 | 3 |
0.2%
|
|
| 15 | 4 |
0.2%
|
|
| 18 | 1 |
0.1%
|
|
| 20 | 14 |
0.8%
|
|
| 21 | 1 |
0.1%
|
|
| 24 | 1 |
0.1%
|
|
| 25 | 2 |
0.1%
|
|
| 26 | 1 |
0.1%
|
|
| 30 | 1 |
0.1%
|
|
| 31 | 1 |
0.1%
|
|
| 35 | 1 |
0.1%
|
|
| 40 | 2 |
0.1%
|
|
| 44 | 1 |
0.1%
|
|
| 45 | 3 |
0.2%
|
|
| 49 | 2 |
0.1%
|
|
| 50 | 1 |
0.1%
|
|
| 60 | 1 |
0.1%
|
|
| 73 | 1 |
0.1%
|
|
| 75 | 2 |
0.1%
|
|
| 98 | 1 |
0.1%
|
|
| 100 | 1 |
0.1%
|
|
| 115 | 1 |
0.1%
|
|
| 120 | 1 |
0.1%
|
|
| 124 | 1 |
0.1%
|
|
| 999 | No textbook | 906 |
52.1%
|