| Value | Category | Cases | |
|---|---|---|---|
| -9 | Don't know (spontaneous) | 60 | 
                                    
                                    14.3%
                                 | 
| 1 | 2 | 
                                    
                                    0.5%
                                 | |
| 2 | 3 | 
                                    
                                    0.7%
                                 | |
| 4 | 4 | 
                                    
                                    1%
                                 | |
| 5 | 10 | 
                                    
                                    2.4%
                                 | |
| 6 | 1 | 
                                    
                                    0.2%
                                 | |
| 7 | 4 | 
                                    
                                    1%
                                 | |
| 8 | 2 | 
                                    
                                    0.5%
                                 | |
| 9 | 1 | 
                                    
                                    0.2%
                                 | |
| 10 | 24 | 
                                    
                                    5.7%
                                 | |
| 12 | 3 | 
                                    
                                    0.7%
                                 | |
| 13 | 2 | 
                                    
                                    0.5%
                                 | |
| 14 | 2 | 
                                    
                                    0.5%
                                 | |
| 15 | 17 | 
                                    
                                    4%
                                 | |
| 18 | 2 | 
                                    
                                    0.5%
                                 | |
| 19 | 1 | 
                                    
                                    0.2%
                                 | |
| 20 | 25 | 
                                    
                                    6%
                                 | |
| 22 | 2 | 
                                    
                                    0.5%
                                 | |
| 25 | 20 | 
                                    
                                    4.8%
                                 | |
| 27 | 1 | 
                                    
                                    0.2%
                                 | |
| 28 | 1 | 
                                    
                                    0.2%
                                 | |
| 30 | 25 | 
                                    
                                    6%
                                 | |
| 33 | 9 | 
                                    
                                    2.1%
                                 | |
| 35 | 8 | 
                                    
                                    1.9%
                                 | |
| 37 | 1 | 
                                    
                                    0.2%
                                 | |
| 40 | 20 | 
                                    
                                    4.8%
                                 | |
| 45 | 3 | 
                                    
                                    0.7%
                                 | |
| 46 | 1 | 
                                    
                                    0.2%
                                 | |
| 49 | 1 | 
                                    
                                    0.2%
                                 | |
| 50 | 38 | 
                                    
                                    9%
                                 | |
| 51 | 2 | 
                                    
                                    0.5%
                                 | |
| 55 | 3 | 
                                    
                                    0.7%
                                 | |
| 60 | 10 | 
                                    
                                    2.4%
                                 | |
| 65 | 2 | 
                                    
                                    0.5%
                                 | |
| 70 | 2 | 
                                    
                                    0.5%
                                 | |
| 80 | 4 | 
                                    
                                    1%
                                 | |
| 90 | 3 | 
                                    
                                    0.7%
                                 | |
| 99 | 1 | 
                                    
                                    0.2%
                                 | |
| 100 | 100 | 
                                    
                                    23.8%
                                 | |
| Sysmiss | 192 |