| Value | Category | Cases | |
|---|---|---|---|
| -9 | don't know | 22 | 
                                    
                                    16.3%
                                 | 
| -5 | termless | 59 | 
                                    
                                    43.7%
                                 | 
| 1 | less than one month | 5 | 
                                    
                                    3.7%
                                 | 
| 2 | 3 | 
                                    
                                    2.2%
                                 | |
| 3 | 4 | 
                                    
                                    3%
                                 | |
| 4 | 2 | 
                                    
                                    1.5%
                                 | |
| 5 | 2 | 
                                    
                                    1.5%
                                 | |
| 6 | 4 | 
                                    
                                    3%
                                 | |
| 10 | 1 | 
                                    
                                    0.7%
                                 | |
| 12 | 17 | 
                                    
                                    12.6%
                                 | |
| 24 | 7 | 
                                    
                                    5.2%
                                 | |
| 36 | 4 | 
                                    
                                    3%
                                 | |
| 60 | 3 | 
                                    
                                    2.2%
                                 | |
| 84 | 1 | 
                                    
                                    0.7%
                                 | |
| 200 | 1 | 
                                    
                                    0.7%
                                 | |
| Sysmiss | 820 |