| Value | Category | Cases | |
|---|---|---|---|
| 0 | 00 not used at all | 121 | 
                                                                 
                                    
                                    8%
                                 
                                                             | 
                                                        
                    
| 1 | 01 | 17 | 
                                                                 
                                    
                                    1.1%
                                 
                                                             | 
                                                        
                    
| 2 | 02 | 38 | 
                                                                 
                                    
                                    2.5%
                                 
                                                             | 
                                                        
                    
| 3 | 03 | 57 | 
                                                                 
                                    
                                    3.8%
                                 
                                                             | 
                                                        
                    
| 4 | 04 | 43 | 
                                                                 
                                    
                                    2.8%
                                 
                                                             | 
                                                        
                    
| 5 | 05 | 135 | 
                                                                 
                                    
                                    8.9%
                                 
                                                             | 
                                                        
                    
| 6 | 06 | 63 | 
                                                                 
                                    
                                    4.2%
                                 
                                                             | 
                                                        
                    
| 7 | 07 | 105 | 
                                                                 
                                    
                                    6.9%
                                 
                                                             | 
                                                        
                    
| 8 | 08 | 191 | 
                                                                 
                                    
                                    12.6%
                                 
                                                             | 
                                                        
                    
| 9 | 09 | 76 | 
                                                                 
                                    
                                    5%
                                 
                                                             | 
                                                        
                    
| 10 | 10 used a lot | 229 | 
                                                                 
                                    
                                    15.2%
                                 
                                                             | 
                                                        
                    
| 98 | 98 don't know | 1 | 
                                                                 
                                    
                                    0.1%
                                 
                                                             | 
                                                        
                    
| 99 | 99 no answer | 1 | 
                                                                 
                                    
                                    0.1%
                                 
                                                             | 
                                                        
                    
| Sysmiss | 434 | 
                                                                 
                                    
                                    28.7%
                                 
                                                             |