| Value | Category | Cases | |
|---|---|---|---|
| -9 | Don't know (spontaneous) | 0 | 
                                    
                                    0%
                                 | 
| 0 | 46 | 
                                    
                                    5.2%
                                 | |
| 2 | 1 | 
                                    
                                    0.1%
                                 | |
| 4 | 1 | 
                                    
                                    0.1%
                                 | |
| 5 | 1 | 
                                    
                                    0.1%
                                 | |
| 7 | 1 | 
                                    
                                    0.1%
                                 | |
| 10 | 3 | 
                                    
                                    0.3%
                                 | |
| 15 | 1 | 
                                    
                                    0.1%
                                 | |
| 20 | 6 | 
                                    
                                    0.7%
                                 | |
| 25 | 4 | 
                                    
                                    0.5%
                                 | |
| 30 | 8 | 
                                    
                                    0.9%
                                 | |
| 33 | 1 | 
                                    
                                    0.1%
                                 | |
| 35 | 1 | 
                                    
                                    0.1%
                                 | |
| 40 | 10 | 
                                    
                                    1.1%
                                 | |
| 45 | 2 | 
                                    
                                    0.2%
                                 | |
| 50 | 35 | 
                                    
                                    4%
                                 | |
| 60 | 13 | 
                                    
                                    1.5%
                                 | |
| 65 | 2 | 
                                    
                                    0.2%
                                 | |
| 70 | 16 | 
                                    
                                    1.8%
                                 | |
| 75 | 7 | 
                                    
                                    0.8%
                                 | |
| 80 | 46 | 
                                    
                                    5.2%
                                 | |
| 85 | 5 | 
                                    
                                    0.6%
                                 | |
| 90 | 28 | 
                                    
                                    3.2%
                                 | |
| 95 | 13 | 
                                    
                                    1.5%
                                 | |
| 96 | 2 | 
                                    
                                    0.2%
                                 | |
| 97 | 1 | 
                                    
                                    0.1%
                                 | |
| 98 | 1 | 
                                    
                                    0.1%
                                 | |
| 99 | 3 | 
                                    
                                    0.3%
                                 | |
| 100 | 621 | 
                                    
                                    70.6%
                                 | |
| Sysmiss | 145 |