| Value | Category | Cases | |
|---|---|---|---|
| -9 | Don't know (spontaneous) | 120 | 
                                    
                                    20%
                                 | 
| -8 | Refusal (spontaneous) | 1 | 
                                    
                                    0.2%
                                 | 
| 0 | 87 | 
                                    
                                    14.5%
                                 | |
| 1 | 21 | 
                                    
                                    3.5%
                                 | |
| 2 | 10 | 
                                    
                                    1.7%
                                 | |
| 3 | 13 | 
                                    
                                    2.2%
                                 | |
| 4 | 17 | 
                                    
                                    2.8%
                                 | |
| 5 | 50 | 
                                    
                                    8.3%
                                 | |
| 6 | 9 | 
                                    
                                    1.5%
                                 | |
| 7 | 4 | 
                                    
                                    0.7%
                                 | |
| 8 | 2 | 
                                    
                                    0.3%
                                 | |
| 10 | 16 | 
                                    
                                    2.7%
                                 | |
| 11 | 2 | 
                                    
                                    0.3%
                                 | |
| 12 | 6 | 
                                    
                                    1%
                                 | |
| 13 | 4 | 
                                    
                                    0.7%
                                 | |
| 14 | 2 | 
                                    
                                    0.3%
                                 | |
| 15 | 6 | 
                                    
                                    1%
                                 | |
| 16 | 11 | 
                                    
                                    1.8%
                                 | |
| 17 | 6 | 
                                    
                                    1%
                                 | |
| 18 | 4 | 
                                    
                                    0.7%
                                 | |
| 19 | 2 | 
                                    
                                    0.3%
                                 | |
| 20 | 53 | 
                                    
                                    8.8%
                                 | |
| 21 | 34 | 
                                    
                                    5.7%
                                 | |
| 22 | 44 | 
                                    
                                    7.3%
                                 | |
| 23 | 9 | 
                                    
                                    1.5%
                                 | |
| 24 | 4 | 
                                    
                                    0.7%
                                 | |
| 25 | 15 | 
                                    
                                    2.5%
                                 | |
| 26 | 1 | 
                                    
                                    0.2%
                                 | |
| 27 | 1 | 
                                    
                                    0.2%
                                 | |
| 28 | 5 | 
                                    
                                    0.8%
                                 | |
| 29 | 1 | 
                                    
                                    0.2%
                                 | |
| 30 | 17 | 
                                    
                                    2.8%
                                 | |
| 31 | 2 | 
                                    
                                    0.3%
                                 | |
| 32 | 2 | 
                                    
                                    0.3%
                                 | |
| 33 | 3 | 
                                    
                                    0.5%
                                 | |
| 34 | 3 | 
                                    
                                    0.5%
                                 | |
| 35 | 5 | 
                                    
                                    0.8%
                                 | |
| 38 | 1 | 
                                    
                                    0.2%
                                 | |
| 40 | 1 | 
                                    
                                    0.2%
                                 | |
| 47 | 1 | 
                                    
                                    0.2%
                                 | |
| 50 | 4 | 
                                    
                                    0.7%
                                 | |
| 55 | 1 | 
                                    
                                    0.2%
                                 |