| Value | Category | Cases | |
|---|---|---|---|
| 1 | never, i always have enough on hand | 559 | 
                                                                 
                                    
                                    34.8%
                                 
                                                             | 
                                                        
                    
| 2 | not very frequent, once every 6 months or so | 363 | 
                                                                 
                                    
                                    22.6%
                                 
                                                             | 
                                                        
                    
| 3 | once every three months | 298 | 
                                                                 
                                    
                                    18.6%
                                 
                                                             | 
                                                        
                    
| 4 | once a month or more frequent | 386 | 
                                                                 
                                    
                                    24%
                                 
                                                             | 
                                                        
                    
| Sysmiss | 1533 |