| Value | Category | Cases | |
|---|---|---|---|
| 0 | 0 not used at all | 458 | 
                                                                 
                                    
                                    30.2%
                                 
                                                             | 
                                                        
                    
| 1 | 1 | 59 | 
                                                                 
                                    
                                    3.9%
                                 
                                                             | 
                                                        
                    
| 2 | 2 | 86 | 
                                                                 
                                    
                                    5.7%
                                 
                                                             | 
                                                        
                    
| 3 | 3 | 79 | 
                                                                 
                                    
                                    5.2%
                                 
                                                             | 
                                                        
                    
| 4 | 4 | 70 | 
                                                                 
                                    
                                    4.6%
                                 
                                                             | 
                                                        
                    
| 5 | 5 | 147 | 
                                                                 
                                    
                                    9.7%
                                 
                                                             | 
                                                        
                    
| 6 | 6 | 54 | 
                                                                 
                                    
                                    3.6%
                                 
                                                             | 
                                                        
                    
| 7 | 7 | 48 | 
                                                                 
                                    
                                    3.2%
                                 
                                                             | 
                                                        
                    
| 8 | 8 | 37 | 
                                                                 
                                    
                                    2.4%
                                 
                                                             | 
                                                        
                    
| 9 | 9 | 5 | 
                                                                 
                                    
                                    0.3%
                                 
                                                             | 
                                                        
                    
| 10 | 10 used a lot | 19 | 
                                                                 
                                    
                                    1.3%
                                 
                                                             | 
                                                        
                    
| 98 | 98 don't know | 2 | 
                                                                 
                                    
                                    0.1%
                                 
                                                             | 
                                                        
                    
| 99 | 99 no answer | 2 | 
                                                                 
                                    
                                    0.1%
                                 
                                                             | 
                                                        
                    
| Sysmiss | 453 | 
                                                                 
                                    
                                    29.8%
                                 
                                                             |