| Value | Category | Cases | |
|---|---|---|---|
| -99 | Don't know | 0 | 
                                    
                                    0%
                                 | 
| -9 | Don't know (spontaneous) | 0 | 
                                    
                                    0%
                                 | 
| 0 | 3 | 
                                    
                                    1.6%
                                 | |
| 1 | 1 | 
                                    
                                    0.5%
                                 | |
| 2 | 1 | 
                                    
                                    0.5%
                                 | |
| 10 | 2 | 
                                    
                                    1%
                                 | |
| 20 | 1 | 
                                    
                                    0.5%
                                 | |
| 40 | 1 | 
                                    
                                    0.5%
                                 | |
| 45 | 2 | 
                                    
                                    1%
                                 | |
| 50 | 2 | 
                                    
                                    1%
                                 | |
| 60 | 1 | 
                                    
                                    0.5%
                                 | |
| 65 | 1 | 
                                    
                                    0.5%
                                 | |
| 75 | 1 | 
                                    
                                    0.5%
                                 | |
| 77 | 1 | 
                                    
                                    0.5%
                                 | |
| 80 | 4 | 
                                    
                                    2.1%
                                 | |
| 82 | 1 | 
                                    
                                    0.5%
                                 | |
| 85 | 3 | 
                                    
                                    1.6%
                                 | |
| 90 | 9 | 
                                    
                                    4.7%
                                 | |
| 95 | 3 | 
                                    
                                    1.6%
                                 | |
| 97 | 1 | 
                                    
                                    0.5%
                                 | |
| 98 | 3 | 
                                    
                                    1.6%
                                 | |
| 100 | 150 | 
                                    
                                    78.5%
                                 | |
| Sysmiss | 154 |