| Value | Category | Cases | |
|---|---|---|---|
| -99 | Don't know | 0 | 
                                    
                                    0%
                                 | 
| 0 | Less than 1 Year | 0 | 
                                    
                                    0%
                                 | 
| 1 | 2 | 
                                    
                                    14.3%
                                 | |
| 2 | 3 | 
                                    
                                    21.4%
                                 | |
| 3 | 1 | 
                                    
                                    7.1%
                                 | |
| 5 | 1 | 
                                    
                                    7.1%
                                 | |
| 6 | 1 | 
                                    
                                    7.1%
                                 | |
| 10 | 2 | 
                                    
                                    14.3%
                                 | |
| 15 | 1 | 
                                    
                                    7.1%
                                 | |
| 25 | 1 | 
                                    
                                    7.1%
                                 | |
| 29 | 1 | 
                                    
                                    7.1%
                                 | |
| 30 | 1 | 
                                    
                                    7.1%
                                 | |
| Sysmiss | 114 |