| Value | Category | Cases | |
|---|---|---|---|
| 1 | 1. CONSTRUCTED/PURCHASED BEFORE 2011 | 3 | 
                                                                 
                                    
                                    60%
                                 
                                                             | 
                                                        
                    
| 2 | 2. CONSTRUCTED AFTER 2011 | 2 | 
                                                                 
                                    
                                    40%
                                 
                                                             | 
                                                        
                    
| Sysmiss | .don't know | 0 | |
| Sysmiss | .qre refused | 0 | |
| Sysmiss | .refusal | 0 | |
| Sysmiss | .skip | 0 | |
| Sysmiss | .x. censored | 0 | |
| Sysmiss | 1429 |