| Value | Category | Cases | |
|---|---|---|---|
| -9 | Don't know (spontaneous) | 74 | 
                                    
                                    11.5%
                                 | 
| -8 | Refusal (spontaneous) | 58 | 
                                    
                                    9%
                                 | 
| 0 | 7 | 
                                    
                                    1.1%
                                 | |
| 1 | 1 | 
                                    
                                    0.2%
                                 | |
| 2 | 2 | 
                                    
                                    0.3%
                                 | |
| 3 | 2 | 
                                    
                                    0.3%
                                 | |
| 4 | 7 | 
                                    
                                    1.1%
                                 | |
| 5 | 12 | 
                                    
                                    1.9%
                                 | |
| 6 | 8 | 
                                    
                                    1.2%
                                 | |
| 7 | 2 | 
                                    
                                    0.3%
                                 | |
| 8 | 4 | 
                                    
                                    0.6%
                                 | |
| 9 | 3 | 
                                    
                                    0.5%
                                 | |
| 10 | 29 | 
                                    
                                    4.5%
                                 | |
| 11 | 10 | 
                                    
                                    1.6%
                                 | |
| 12 | 16 | 
                                    
                                    2.5%
                                 | |
| 13 | 14 | 
                                    
                                    2.2%
                                 | |
| 14 | 5 | 
                                    
                                    0.8%
                                 | |
| 15 | 86 | 
                                    
                                    13.3%
                                 | |
| 16 | 14 | 
                                    
                                    2.2%
                                 | |
| 17 | 18 | 
                                    
                                    2.8%
                                 | |
| 18 | 7 | 
                                    
                                    1.1%
                                 | |
| 19 | 75 | 
                                    
                                    11.6%
                                 | |
| 20 | 106 | 
                                    
                                    16.4%
                                 | |
| 22 | 2 | 
                                    
                                    0.3%
                                 | |
| 23 | 4 | 
                                    
                                    0.6%
                                 | |
| 24 | 2 | 
                                    
                                    0.3%
                                 | |
| 25 | 40 | 
                                    
                                    6.2%
                                 | |
| 26 | 1 | 
                                    
                                    0.2%
                                 | |
| 28 | 2 | 
                                    
                                    0.3%
                                 | |
| 30 | 18 | 
                                    
                                    2.8%
                                 | |
| 35 | 13 | 
                                    
                                    2%
                                 | |
| 40 | 1 | 
                                    
                                    0.2%
                                 | |
| 50 | 1 | 
                                    
                                    0.2%
                                 | |
| 60 | 1 | 
                                    
                                    0.2%
                                 |