| Value | Category | Cases | |
|---|---|---|---|
| -9 | don't know | 9 | 
                                    
                                    3.3%
                                 | 
| 0 | 66 | 
                                    
                                    23.9%
                                 | |
| 1 | 56 | 
                                    
                                    20.3%
                                 | |
| 2 | 36 | 
                                    
                                    13%
                                 | |
| 3 | 34 | 
                                    
                                    12.3%
                                 | |
| 4 | 15 | 
                                    
                                    5.4%
                                 | |
| 5 | 18 | 
                                    
                                    6.5%
                                 | |
| 6 | 3 | 
                                    
                                    1.1%
                                 | |
| 7 | 5 | 
                                    
                                    1.8%
                                 | |
| 8 | 5 | 
                                    
                                    1.8%
                                 | |
| 10 | 19 | 
                                    
                                    6.9%
                                 | |
| 12 | 2 | 
                                    
                                    0.7%
                                 | |
| 15 | 2 | 
                                    
                                    0.7%
                                 | |
| 20 | 2 | 
                                    
                                    0.7%
                                 | |
| 30 | 1 | 
                                    
                                    0.4%
                                 | |
| 40 | 2 | 
                                    
                                    0.7%
                                 | |
| 50 | 1 | 
                                    
                                    0.4%
                                 | |
| Sysmiss | 679 |