| Value | Category | Cases | |
|---|---|---|---|
| -9 | Don't know (spontaneous) | 12 | 
                                    
                                    2.8%
                                 | 
| 0 | 61 | 
                                    
                                    14.1%
                                 | |
| 1 | One minute or less | 117 | 
                                    
                                    27%
                                 | 
| 2 | 2 | 
                                    
                                    0.5%
                                 | |
| 5 | 7 | 
                                    
                                    1.6%
                                 | |
| 10 | 27 | 
                                    
                                    6.2%
                                 | |
| 15 | 22 | 
                                    
                                    5.1%
                                 | |
| 20 | 24 | 
                                    
                                    5.5%
                                 | |
| 25 | 15 | 
                                    
                                    3.5%
                                 | |
| 30 | 62 | 
                                    
                                    14.3%
                                 | |
| 35 | 7 | 
                                    
                                    1.6%
                                 | |
| 40 | 9 | 
                                    
                                    2.1%
                                 | |
| 45 | 20 | 
                                    
                                    4.6%
                                 | |
| 50 | 13 | 
                                    
                                    3%
                                 | |
| 55 | 7 | 
                                    
                                    1.6%
                                 | |
| 59 | 29 | 
                                    
                                    6.7%
                                 | |
| Sysmiss | 982 |