| Value | Category | Cases | |
|---|---|---|---|
| 1 term | 168 | 
                                                                 
                                    
                                    14%
                                 
                                                             | 
                                                        
                    |
| 10 terms | 15 | 
                                                                 
                                    
                                    1.3%
                                 
                                                             | 
                                                        
                    |
| 2 terms | 575 | 
                                                                 
                                    
                                    47.9%
                                 
                                                             | 
                                                        
                    |
| 3 terms | 68 | 
                                                                 
                                    
                                    5.7%
                                 
                                                             | 
                                                        
                    |
| 4 terms | 15 | 
                                                                 
                                    
                                    1.3%
                                 
                                                             | 
                                                        
                    |
| 5 terms | 33 | 
                                                                 
                                    
                                    2.8%
                                 
                                                             | 
                                                        
                    |
| 5 times | 3 | 
                                                                 
                                    
                                    0.3%
                                 
                                                             | 
                                                        
                    |
| 5 years | 16 | 
                                                                 
                                    
                                    1.3%
                                 
                                                             | 
                                                        
                    |
| Can't remember | 2 | 
                                                                 
                                    
                                    0.2%
                                 
                                                             | 
                                                        
                    |
| Don't know | 236 | 
                                                                 
                                    
                                    19.7%
                                 
                                                             | 
                                                        
                    |
| Fifteen years | 1 | 
                                                                 
                                    
                                    0.1%
                                 
                                                             | 
                                                        
                    |
| Five years | 11 | 
                                                                 
                                    
                                    0.9%
                                 
                                                             | 
                                                        
                    |
| Forever | 18 | 
                                                                 
                                    
                                    1.5%
                                 
                                                             | 
                                                        
                    |
| Many times | 17 | 
                                                                 
                                    
                                    1.4%
                                 
                                                             | 
                                                        
                    |
| No idea | 16 | 
                                                                 
                                    
                                    1.3%
                                 
                                                             | 
                                                        
                    |
| several times | 5 | 
                                                                 
                                    
                                    0.4%
                                 
                                                             | 
                                                        
                    |
| Twenty years | 1 | 
                                                                 
                                    
                                    0.1%
                                 
                                                             |