| Value | Category | Cases | |
|---|---|---|---|
| 1 | Everyday | 26 | 
                                
                                0.1%
                             | 
| 2 | Once a week | 58 | 
                                
                                0.2%
                             | 
| 3 | Once a month | 1047 | 
                                
                                3%
                             | 
| 4 | Once a term | 2098 | 
                                
                                6%
                             | 
| 5 | Once a year | 1630 | 
                                
                                4.6%
                             | 
| 6 | Unspecified | 185 | 
                                
                                0.5%
                             | 
| 95 | Missing | 23 | 
                                
                                0.1%
                             | 
| 98 | Don't know | 17 | 
                                
                                0%
                             | 
| 99 | NA | 30105 | 
                                
                                85.6%
                             |