| Value | Category | Cases | |
|---|---|---|---|
| -9 | don't know | 0 | 
                                    
                                    0%
                                 | 
| 0 | 194 | 
                                    
                                    78.5%
                                 | |
| 8 | 1 | 
                                    
                                    0.4%
                                 | |
| 10 | 5 | 
                                    
                                    2%
                                 | |
| 15 | 1 | 
                                    
                                    0.4%
                                 | |
| 20 | 3 | 
                                    
                                    1.2%
                                 | |
| 30 | 5 | 
                                    
                                    2%
                                 | |
| 35 | 2 | 
                                    
                                    0.8%
                                 | |
| 40 | 7 | 
                                    
                                    2.8%
                                 | |
| 49 | 1 | 
                                    
                                    0.4%
                                 | |
| 50 | 6 | 
                                    
                                    2.4%
                                 | |
| 55 | 1 | 
                                    
                                    0.4%
                                 | |
| 60 | 3 | 
                                    
                                    1.2%
                                 | |
| 70 | 4 | 
                                    
                                    1.6%
                                 | |
| 75 | 1 | 
                                    
                                    0.4%
                                 | |
| 77 | 1 | 
                                    
                                    0.4%
                                 | |
| 80 | 4 | 
                                    
                                    1.6%
                                 | |
| 90 | 2 | 
                                    
                                    0.8%
                                 | |
| 100 | 6 | 
                                    
                                    2.4%
                                 | |
| Sysmiss | 708 |