| Value | Category | Cases | |
|---|---|---|---|
| -9 | Don't know (spontaneous) | 18 | 
                                    
                                    1.8%
                                 | 
| -8 | Refusal (spontaneous) | 335 | 
                                    
                                    32.7%
                                 | 
| 0 | 10 | 
                                    
                                    1%
                                 | |
| 1 | 6 | 
                                    
                                    0.6%
                                 | |
| 2 | 41 | 
                                    
                                    4%
                                 | |
| 3 | 45 | 
                                    
                                    4.4%
                                 | |
| 4 | 26 | 
                                    
                                    2.5%
                                 | |
| 5 | 100 | 
                                    
                                    9.8%
                                 | |
| 6 | 16 | 
                                    
                                    1.6%
                                 | |
| 7 | 12 | 
                                    
                                    1.2%
                                 | |
| 8 | 36 | 
                                    
                                    3.5%
                                 | |
| 9 | 3 | 
                                    
                                    0.3%
                                 | |
| 10 | 109 | 
                                    
                                    10.6%
                                 | |
| 11 | 3 | 
                                    
                                    0.3%
                                 | |
| 12 | 82 | 
                                    
                                    8%
                                 | |
| 13 | 3 | 
                                    
                                    0.3%
                                 | |
| 14 | 1 | 
                                    
                                    0.1%
                                 | |
| 15 | 74 | 
                                    
                                    7.2%
                                 | |
| 18 | 4 | 
                                    
                                    0.4%
                                 | |
| 20 | 59 | 
                                    
                                    5.8%
                                 | |
| 25 | 12 | 
                                    
                                    1.2%
                                 | |
| 30 | 18 | 
                                    
                                    1.8%
                                 | |
| 35 | 3 | 
                                    
                                    0.3%
                                 | |
| 36 | 1 | 
                                    
                                    0.1%
                                 | |
| 38 | 1 | 
                                    
                                    0.1%
                                 | |
| 40 | 3 | 
                                    
                                    0.3%
                                 | |
| 49 | 1 | 
                                    
                                    0.1%
                                 | |
| 50 | 2 | 
                                    
                                    0.2%
                                 |