| Value | Category | Cases | |
|---|---|---|---|
| 1 | Everyday | 6 | 
                                
                                0%
                             | 
| 2 | Once a week | 12 | 
                                
                                0%
                             | 
| 3 | Once a month | 1152 | 
                                
                                3.3%
                             | 
| 4 | Once a term | 3493 | 
                                
                                9.9%
                             | 
| 5 | Once a year | 2827 | 
                                
                                8%
                             | 
| 6 | Unspecified | 85 | 
                                
                                0.2%
                             | 
| 95 | Missing | 12 | 
                                
                                0%
                             | 
| 98 | Don't know | 13 | 
                                
                                0%
                             | 
| 99 | NA | 27589 | 
                                
                                78.4%
                             |