| Value | Category | Cases | |
|---|---|---|---|
| 0 | 00 not used at all | 850 | 
                                                                 
                                    
                                    55.5%
                                 
                                                             | 
                                                        
                    
| 1 | 01 | 59 | 
                                                                 
                                    
                                    3.9%
                                 
                                                             | 
                                                        
                    
| 2 | 02 | 57 | 
                                                                 
                                    
                                    3.7%
                                 
                                                             | 
                                                        
                    
| 3 | 03 | 47 | 
                                                                 
                                    
                                    3.1%
                                 
                                                             | 
                                                        
                    
| 4 | 04 | 32 | 
                                                                 
                                    
                                    2.1%
                                 
                                                             | 
                                                        
                    
| 5 | 05 | 59 | 
                                                                 
                                    
                                    3.9%
                                 
                                                             | 
                                                        
                    
| 6 | 06 | 29 | 
                                                                 
                                    
                                    1.9%
                                 
                                                             | 
                                                        
                    
| 7 | 07 | 36 | 
                                                                 
                                    
                                    2.4%
                                 
                                                             | 
                                                        
                    
| 8 | 08 | 31 | 
                                                                 
                                    
                                    2%
                                 
                                                             | 
                                                        
                    
| 9 | 09 | 12 | 
                                                                 
                                    
                                    0.8%
                                 
                                                             | 
                                                        
                    
| 10 | 10 used a lot | 20 | 
                                                                 
                                    
                                    1.3%
                                 
                                                             | 
                                                        
                    
| 98 | 98 don't know | 1 | 
                                                                 
                                    
                                    0.1%
                                 
                                                             | 
                                                        
                    
| 99 | 99 no answer | 1 | 
                                                                 
                                    
                                    0.1%
                                 
                                                             | 
                                                        
                    
| Sysmiss | 297 | 
                                                                 
                                    
                                    19.4%
                                 
                                                             |