| Value | Category | Cases | |
|---|---|---|---|
| 1 | Twice or more per month | 60 | 
                                    
                                    10.2%
                                 | 
| 2 | Monthly | 40 | 
                                    
                                    6.8%
                                 | 
| 3 | Quarterly | 49 | 
                                    
                                    8.3%
                                 | 
| 4 | Semi-annually | 86 | 
                                    
                                    14.6%
                                 | 
| 5 | Annually | 30 | 
                                    
                                    5.1%
                                 | 
| 6 | Sporadically as needed | 319 | 
                                    
                                    54.2%
                                 | 
| 7 | Other (specify) | 5 | 
                                    
                                    0.8%
                                 | 
| Sysmiss | 4421 |