| Value | Category | Cases | |
|---|---|---|---|
| -99 | Don't know | 0 | 
                                    
                                    0%
                                 | 
| 0 | Less than 1 Year | 1 | 
                                    
                                    1.3%
                                 | 
| 1 | 1 | 
                                    
                                    1.3%
                                 | |
| 2 | 24 | 
                                    
                                    30.4%
                                 | |
| 3 | 13 | 
                                    
                                    16.5%
                                 | |
| 4 | 5 | 
                                    
                                    6.3%
                                 | |
| 5 | 1 | 
                                    
                                    1.3%
                                 | |
| 6 | 2 | 
                                    
                                    2.5%
                                 | |
| 8 | 2 | 
                                    
                                    2.5%
                                 | |
| 10 | 3 | 
                                    
                                    3.8%
                                 | |
| 12 | 2 | 
                                    
                                    2.5%
                                 | |
| 15 | 6 | 
                                    
                                    7.6%
                                 | |
| 20 | 4 | 
                                    
                                    5.1%
                                 | |
| 25 | 4 | 
                                    
                                    5.1%
                                 | |
| 26 | 1 | 
                                    
                                    1.3%
                                 | |
| 30 | 3 | 
                                    
                                    3.8%
                                 | |
| 32 | 1 | 
                                    
                                    1.3%
                                 | |
| 33 | 1 | 
                                    
                                    1.3%
                                 | |
| 35 | 2 | 
                                    
                                    2.5%
                                 | |
| 40 | 3 | 
                                    
                                    3.8%
                                 | |
| Sysmiss | 49 |