| Value | Category | Cases | |
|---|---|---|---|
| 0 | 307 |
17.7%
|
|
| 1 | 278 |
16%
|
|
| 2 | 75 |
4.3%
|
|
| 3 | 40 |
2.3%
|
|
| 4 | 17 |
1%
|
|
| 5 | 28 |
1.6%
|
|
| 6 | 10 |
0.6%
|
|
| 7 | 2 |
0.1%
|
|
| 8 | 7 |
0.4%
|
|
| 9 | 2 |
0.1%
|
|
| 10 | 22 |
1.3%
|
|
| 12 | 4 |
0.2%
|
|
| 15 | 2 |
0.1%
|
|
| 17 | 1 |
0.1%
|
|
| 18 | 1 |
0.1%
|
|
| 20 | 13 |
0.7%
|
|
| 24 | 1 |
0.1%
|
|
| 25 | 2 |
0.1%
|
|
| 26 | 1 |
0.1%
|
|
| 31 | 1 |
0.1%
|
|
| 35 | 1 |
0.1%
|
|
| 40 | 3 |
0.2%
|
|
| 45 | 1 |
0.1%
|
|
| 50 | 2 |
0.1%
|
|
| 60 | 3 |
0.2%
|
|
| 73 | 1 |
0.1%
|
|
| 75 | 2 |
0.1%
|
|
| 98 | 1 |
0.1%
|
|
| 100 | 1 |
0.1%
|
|
| 115 | 1 |
0.1%
|
|
| 120 | 1 |
0.1%
|
|
| 128 | 1 |
0.1%
|
|
| 999 | No textbook | 906 |
52.1%
|