| Value | Category | Cases | |
|---|---|---|---|
| -9 | don't know | 17 | 
                                    
                                    14.8%
                                 | 
| 3 | 2 | 
                                    
                                    1.7%
                                 | |
| 10 | 3 | 
                                    
                                    2.6%
                                 | |
| 13 | 1 | 
                                    
                                    0.9%
                                 | |
| 20 | 3 | 
                                    
                                    2.6%
                                 | |
| 25 | 1 | 
                                    
                                    0.9%
                                 | |
| 50 | 7 | 
                                    
                                    6.1%
                                 | |
| 60 | 2 | 
                                    
                                    1.7%
                                 | |
| 70 | 1 | 
                                    
                                    0.9%
                                 | |
| 77 | 1 | 
                                    
                                    0.9%
                                 | |
| 80 | 1 | 
                                    
                                    0.9%
                                 | |
| 100 | 40 | 
                                    
                                    34.8%
                                 | |
| 110 | 1 | 
                                    
                                    0.9%
                                 | |
| 120 | 10 | 
                                    
                                    8.7%
                                 | |
| 130 | 5 | 
                                    
                                    4.3%
                                 | |
| 140 | 3 | 
                                    
                                    2.6%
                                 | |
| 150 | 5 | 
                                    
                                    4.3%
                                 | |
| 200 | 10 | 
                                    
                                    8.7%
                                 | |
| 300 | 2 | 
                                    
                                    1.7%
                                 | |
| Sysmiss | 840 |