| Value | Category | Cases | |
|---|---|---|---|
| -9 | Don't know (spontaneous) | 0 | 
                                    
                                    0%
                                 | 
| 0 | 39 | 
                                    
                                    30%
                                 | |
| 1 | One minute or less | 68 | 
                                    
                                    52.3%
                                 | 
| 2 | 1 | 
                                    
                                    0.8%
                                 | |
| 10 | 3 | 
                                    
                                    2.3%
                                 | |
| 15 | 2 | 
                                    
                                    1.5%
                                 | |
| 20 | 3 | 
                                    
                                    2.3%
                                 | |
| 25 | 4 | 
                                    
                                    3.1%
                                 | |
| 30 | 3 | 
                                    
                                    2.3%
                                 | |
| 35 | 1 | 
                                    
                                    0.8%
                                 | |
| 40 | 3 | 
                                    
                                    2.3%
                                 | |
| 45 | 3 | 
                                    
                                    2.3%
                                 | |
| Sysmiss | 20 |