| Value | Category | Cases | |
|---|---|---|---|
| 0 | No | 223 | 
                                
                                5.9%
                             | 
| 1 | Yes | 763 | 
                                
                                20.3%
                             | 
| 3 | 20 | 
                                
                                0.5%
                             | |
| 5 | 1 | 
                                
                                0%
                             | |
| 8 | Don't know | 9 | 
                                
                                0.2%
                             | 
| 9 | Not yet 9 months | 114 | 
                                
                                3%
                             | 
| 99 | Not applicable | 2620 | 
                                
                                69.9%
                             | 
| Sysmiss | 202 |