| Value | Category | Cases | |
|---|---|---|---|
| -9 | don't know | 26 | 
                                    
                                    19.3%
                                 | 
| 1 | less than one day | 1 | 
                                    
                                    0.7%
                                 | 
| 2 | 1 | 
                                    
                                    0.7%
                                 | |
| 3 | 2 | 
                                    
                                    1.5%
                                 | |
| 5 | 2 | 
                                    
                                    1.5%
                                 | |
| 7 | 3 | 
                                    
                                    2.2%
                                 | |
| 10 | 1 | 
                                    
                                    0.7%
                                 | |
| 14 | 4 | 
                                    
                                    3%
                                 | |
| 15 | 1 | 
                                    
                                    0.7%
                                 | |
| 16 | 1 | 
                                    
                                    0.7%
                                 | |
| 20 | 1 | 
                                    
                                    0.7%
                                 | |
| 24 | 1 | 
                                    
                                    0.7%
                                 | |
| 30 | 33 | 
                                    
                                    24.4%
                                 | |
| 40 | 1 | 
                                    
                                    0.7%
                                 | |
| 45 | 1 | 
                                    
                                    0.7%
                                 | |
| 50 | 1 | 
                                    
                                    0.7%
                                 | |
| 60 | 16 | 
                                    
                                    11.9%
                                 | |
| 90 | 14 | 
                                    
                                    10.4%
                                 | |
| 100 | 2 | 
                                    
                                    1.5%
                                 | |
| 120 | 2 | 
                                    
                                    1.5%
                                 | |
| 150 | 1 | 
                                    
                                    0.7%
                                 | |
| 180 | 8 | 
                                    
                                    5.9%
                                 | |
| 300 | 4 | 
                                    
                                    3%
                                 | |
| 365 | 3 | 
                                    
                                    2.2%
                                 | |
| 600 | 1 | 
                                    
                                    0.7%
                                 | |
| 700 | 2 | 
                                    
                                    1.5%
                                 | |
| 720 | 1 | 
                                    
                                    0.7%
                                 | |
| 900 | 1 | 
                                    
                                    0.7%
                                 | |
| Sysmiss | 820 |