| Value | Category | Cases | |
|---|---|---|---|
| -99 | Don't know | 0 | 
                                    
                                    0%
                                 | 
| 0 | Less than 1 Year | 2 | 
                                    
                                    11.1%
                                 | 
| 1 | 1 | 
                                    
                                    5.6%
                                 | |
| 2 | 5 | 
                                    
                                    27.8%
                                 | |
| 3 | 2 | 
                                    
                                    11.1%
                                 | |
| 5 | 2 | 
                                    
                                    11.1%
                                 | |
| 8 | 1 | 
                                    
                                    5.6%
                                 | |
| 10 | 1 | 
                                    
                                    5.6%
                                 | |
| 12 | 1 | 
                                    
                                    5.6%
                                 | |
| 20 | 1 | 
                                    
                                    5.6%
                                 | |
| 21 | 1 | 
                                    
                                    5.6%
                                 | |
| 40 | 1 | 
                                    
                                    5.6%
                                 | |
| Sysmiss | 110 |