| Value | Category | Cases | |
|---|---|---|---|
| 0 | <12 months | 857 | 
                                    
                                    25.2%
                                 | 
| 1 | 1 year | 367 | 
                                    
                                    10.8%
                                 | 
| 2 | 2 years | 548 | 
                                    
                                    16.1%
                                 | 
| 3 | 3 years | 490 | 
                                    
                                    14.4%
                                 | 
| 4 | 4 years | 237 | 
                                    
                                    7%
                                 | 
| 5 | 5 years | 266 | 
                                    
                                    7.8%
                                 | 
| 6 | 6+ years | 240 | 
                                    
                                    7.1%
                                 | 
| 7 | non-numeric | 227 | 
                                    
                                    6.7%
                                 | 
| 8 | don't know | 164 | 
                                    
                                    4.8%
                                 | 
| Sysmiss | 11550 |