| Value | Category | Cases | |
|---|---|---|---|
| 0 | 00 not used at all | 445 | 
                                                                 
                                    
                                    29.1%
                                 
                                                             | 
                                                        
                    
| 1 | 01 | 46 | 
                                                                 
                                    
                                    3%
                                 
                                                             | 
                                                        
                    
| 2 | 02 | 104 | 
                                                                 
                                    
                                    6.8%
                                 
                                                             | 
                                                        
                    
| 3 | 03 | 102 | 
                                                                 
                                    
                                    6.7%
                                 
                                                             | 
                                                        
                    
| 4 | 04 | 66 | 
                                                                 
                                    
                                    4.3%
                                 
                                                             | 
                                                        
                    
| 5 | 05 | 180 | 
                                                                 
                                    
                                    11.8%
                                 
                                                             | 
                                                        
                    
| 6 | 06 | 83 | 
                                                                 
                                    
                                    5.4%
                                 
                                                             | 
                                                        
                    
| 7 | 07 | 76 | 
                                                                 
                                    
                                    5%
                                 
                                                             | 
                                                        
                    
| 8 | 08 | 82 | 
                                                                 
                                    
                                    5.4%
                                 
                                                             | 
                                                        
                    
| 9 | 09 | 17 | 
                                                                 
                                    
                                    1.1%
                                 
                                                             | 
                                                        
                    
| 10 | 10 used a lot | 22 | 
                                                                 
                                    
                                    1.4%
                                 
                                                             | 
                                                        
                    
| 98 | 98 don't know | 8 | 
                                                                 
                                    
                                    0.5%
                                 
                                                             | 
                                                        
                    
| 99 | 99 no answer | 3 | 
                                                                 
                                    
                                    0.2%
                                 
                                                             | 
                                                        
                    
| Sysmiss | 297 | 
                                                                 
                                    
                                    19.4%
                                 
                                                             |