| Value | Category | Cases | |
|---|---|---|---|
| -99 | Don't know | 0 | 
                                    
                                    0%
                                 | 
| -96 | Other | 3 | 
                                    
                                    2.7%
                                 | 
| 1 | One time only | 57 | 
                                    
                                    50.4%
                                 | 
| 2 | Once a month | 0 | 
                                    
                                    0%
                                 | 
| 3 | Several times a month | 2 | 
                                    
                                    1.8%
                                 | 
| 4 | Twice a year | 6 | 
                                    
                                    5.3%
                                 | 
| 5 | Ongoing | 45 | 
                                    
                                    39.8%
                                 | 
| Sysmiss | 97 |