| Value | Category | Cases | |
|---|---|---|---|
| 0 | 5 |
0.4%
|
|
| 2 | 2 |
0.2%
|
|
| 3 | 3 |
0.3%
|
|
| 4 | 11 |
1%
|
|
| 5 | 64 |
5.7%
|
|
| 6 | 46 |
4.1%
|
|
| 7 | 167 |
14.8%
|
|
| 8 | 43 |
3.8%
|
|
| 9 | 60 |
5.3%
|
|
| 10 | 119 |
10.5%
|
|
| 11 | 106 |
9.4%
|
|
| 12 | 129 |
11.4%
|
|
| 13 | 55 |
4.9%
|
|
| 14 | 50 |
4.4%
|
|
| 15 | 55 |
4.9%
|
|
| 16 | 21 |
1.9%
|
|
| 17 | 15 |
1.3%
|
|
| 18 | 13 |
1.2%
|
|
| 19 | 2 |
0.2%
|
|
| 20 | 6 |
0.5%
|
|
| 21 | 3 |
0.3%
|
|
| 22 | 4 |
0.4%
|
|
| 28 | 1 |
0.1%
|
|
| 30 | 1 |
0.1%
|
|
| 77 | Don't know | 148 |
13.1%
|