| Value | Category | Cases | |
|---|---|---|---|
| 0 | 0 not used at all | 403 | 
                                                                 
                                    
                                    26.5%
                                 
                                                             | 
                                                        
                    
| 1 | 1 | 69 | 
                                                                 
                                    
                                    4.5%
                                 
                                                             | 
                                                        
                    
| 2 | 2 | 112 | 
                                                                 
                                    
                                    7.4%
                                 
                                                             | 
                                                        
                    
| 3 | 3 | 96 | 
                                                                 
                                    
                                    6.3%
                                 
                                                             | 
                                                        
                    
| 4 | 4 | 70 | 
                                                                 
                                    
                                    4.6%
                                 
                                                             | 
                                                        
                    
| 5 | 5 | 106 | 
                                                                 
                                    
                                    7%
                                 
                                                             | 
                                                        
                    
| 6 | 6 | 50 | 
                                                                 
                                    
                                    3.3%
                                 
                                                             | 
                                                        
                    
| 7 | 7 | 52 | 
                                                                 
                                    
                                    3.4%
                                 
                                                             | 
                                                        
                    
| 8 | 8 | 63 | 
                                                                 
                                    
                                    4.1%
                                 
                                                             | 
                                                        
                    
| 9 | 9 | 9 | 
                                                                 
                                    
                                    0.6%
                                 
                                                             | 
                                                        
                    
| 10 | 10 used a lot | 31 | 
                                                                 
                                    
                                    2%
                                 
                                                             | 
                                                        
                    
| 98 | 98 don't know | 4 | 
                                                                 
                                    
                                    0.3%
                                 
                                                             | 
                                                        
                    
| 99 | 99 no answer | 1 | 
                                                                 
                                    
                                    0.1%
                                 
                                                             | 
                                                        
                    
| Sysmiss | 453 | 
                                                                 
                                    
                                    29.8%
                                 
                                                             |