| Value | Category | Cases | |
|---|---|---|---|
| -9 | Don't know (spontaneous) | 45 | 
                                    
                                    3.7%
                                 | 
| 0 | 56 | 
                                    
                                    4.7%
                                 | |
| 1 | 1 | 
                                    
                                    0.1%
                                 | |
| 2 | 1 | 
                                    
                                    0.1%
                                 | |
| 3 | 1 | 
                                    
                                    0.1%
                                 | |
| 4 | 1 | 
                                    
                                    0.1%
                                 | |
| 5 | 7 | 
                                    
                                    0.6%
                                 | |
| 10 | 26 | 
                                    
                                    2.2%
                                 | |
| 13 | 1 | 
                                    
                                    0.1%
                                 | |
| 15 | 7 | 
                                    
                                    0.6%
                                 | |
| 17 | 1 | 
                                    
                                    0.1%
                                 | |
| 20 | 75 | 
                                    
                                    6.2%
                                 | |
| 25 | 35 | 
                                    
                                    2.9%
                                 | |
| 27 | 1 | 
                                    
                                    0.1%
                                 | |
| 30 | 67 | 
                                    
                                    5.6%
                                 | |
| 33 | 1 | 
                                    
                                    0.1%
                                 | |
| 35 | 10 | 
                                    
                                    0.8%
                                 | |
| 40 | 84 | 
                                    
                                    7%
                                 | |
| 44 | 1 | 
                                    
                                    0.1%
                                 | |
| 45 | 1 | 
                                    
                                    0.1%
                                 | |
| 50 | 194 | 
                                    
                                    16.1%
                                 | |
| 55 | 2 | 
                                    
                                    0.2%
                                 | |
| 57 | 1 | 
                                    
                                    0.1%
                                 | |
| 60 | 101 | 
                                    
                                    8.4%
                                 | |
| 65 | 8 | 
                                    
                                    0.7%
                                 | |
| 70 | 76 | 
                                    
                                    6.3%
                                 | |
| 75 | 22 | 
                                    
                                    1.8%
                                 | |
| 80 | 123 | 
                                    
                                    10.2%
                                 | |
| 85 | 16 | 
                                    
                                    1.3%
                                 | |
| 87 | 4 | 
                                    
                                    0.3%
                                 | |
| 89 | 1 | 
                                    
                                    0.1%
                                 | |
| 90 | 47 | 
                                    
                                    3.9%
                                 | |
| 92 | 2 | 
                                    
                                    0.2%
                                 | |
| 93 | 1 | 
                                    
                                    0.1%
                                 | |
| 95 | 13 | 
                                    
                                    1.1%
                                 | |
| 98 | 2 | 
                                    
                                    0.2%
                                 | |
| 100 | 167 | 
                                    
                                    13.9%
                                 | |
| Sysmiss | 214 |