| Value | Category | Cases | |
|---|---|---|---|
| -9 | Don't know (spontaneous) | 9 | 
                                    
                                    3.6%
                                 | 
| 1 | 13 | 
                                    
                                    5.2%
                                 | |
| 2 | 2 | 
                                    
                                    0.8%
                                 | |
| 3 | 4 | 
                                    
                                    1.6%
                                 | |
| 4 | 3 | 
                                    
                                    1.2%
                                 | |
| 5 | 3 | 
                                    
                                    1.2%
                                 | |
| 6 | 2 | 
                                    
                                    0.8%
                                 | |
| 7 | 1 | 
                                    
                                    0.4%
                                 | |
| 8 | 1 | 
                                    
                                    0.4%
                                 | |
| 9 | 1 | 
                                    
                                    0.4%
                                 | |
| 10 | 19 | 
                                    
                                    7.6%
                                 | |
| 14 | 1 | 
                                    
                                    0.4%
                                 | |
| 15 | 4 | 
                                    
                                    1.6%
                                 | |
| 20 | 18 | 
                                    
                                    7.2%
                                 | |
| 23 | 1 | 
                                    
                                    0.4%
                                 | |
| 25 | 12 | 
                                    
                                    4.8%
                                 | |
| 30 | 18 | 
                                    
                                    7.2%
                                 | |
| 31 | 1 | 
                                    
                                    0.4%
                                 | |
| 35 | 3 | 
                                    
                                    1.2%
                                 | |
| 37 | 1 | 
                                    
                                    0.4%
                                 | |
| 38 | 1 | 
                                    
                                    0.4%
                                 | |
| 40 | 14 | 
                                    
                                    5.6%
                                 | |
| 45 | 2 | 
                                    
                                    0.8%
                                 | |
| 48 | 1 | 
                                    
                                    0.4%
                                 | |
| 50 | 26 | 
                                    
                                    10.4%
                                 | |
| 51 | 1 | 
                                    
                                    0.4%
                                 | |
| 52 | 1 | 
                                    
                                    0.4%
                                 | |
| 55 | 1 | 
                                    
                                    0.4%
                                 | |
| 56 | 1 | 
                                    
                                    0.4%
                                 | |
| 60 | 2 | 
                                    
                                    0.8%
                                 | |
| 65 | 2 | 
                                    
                                    0.8%
                                 | |
| 70 | 6 | 
                                    
                                    2.4%
                                 | |
| 75 | 1 | 
                                    
                                    0.4%
                                 | |
| 80 | 5 | 
                                    
                                    2%
                                 | |
| 90 | 3 | 
                                    
                                    1.2%
                                 | |
| 95 | 2 | 
                                    
                                    0.8%
                                 | |
| 100 | 64 | 
                                    
                                    25.6%
                                 | |
| Sysmiss | 1166 |