| Value | Category | Cases | |
|---|---|---|---|
| 1 | Mostly announced | 871 | 
                                    
                                    43.5%
                                 | 
| 2 | Mostly unannounced | 952 | 
                                    
                                    47.6%
                                 | 
| 3 | Don't know | 179 | 
                                    
                                    8.9%
                                 | 
| Sysmiss | 1307 |