| Value | Category | Cases | |
|---|---|---|---|
| -99 | Don't know | 0 | 
                                    
                                    0%
                                 | 
| -9 | Don't know (spontaneous) | 3 | 
                                    
                                    2%
                                 | 
| 1 | Yes | 18 | 
                                    
                                    11.8%
                                 | 
| 2 | No, but expect to receive them in the next 3 months | 3 | 
                                    
                                    2%
                                 | 
| 3 | No | 129 | 
                                    
                                    84.3%
                                 | 
| Sysmiss | 192 |