| Value | Category | Cases | |
|---|---|---|---|
| -9 | Don't know (spontaneous) | 52 | 
                                                                 
                                    
                                    6.2%
                                 
                                                             | 
                                                        
                    
| 2000 | 2 | 
                                                                 
                                    
                                    0.2%
                                 
                                                             | 
                                                        
                    |
| 2001 | 1 | 
                                                                 
                                    
                                    0.1%
                                 
                                                             | 
                                                        
                    |
| 2003 | 1 | 
                                                                 
                                    
                                    0.1%
                                 
                                                             | 
                                                        
                    |
| 2013 | 5 | 
                                                                 
                                    
                                    0.6%
                                 
                                                             | 
                                                        
                    |
| 2014 | 5 | 
                                                                 
                                    
                                    0.6%
                                 
                                                             | 
                                                        
                    |
| 2015 | 3 | 
                                                                 
                                    
                                    0.4%
                                 
                                                             | 
                                                        
                    |
| 2016 | 4 | 
                                                                 
                                    
                                    0.5%
                                 
                                                             | 
                                                        
                    |
| 2017 | 4 | 
                                                                 
                                    
                                    0.5%
                                 
                                                             | 
                                                        
                    |
| 2018 | 8 | 
                                                                 
                                    
                                    1%
                                 
                                                             | 
                                                        
                    |
| 2019 | 19 | 
                                                                 
                                    
                                    2.3%
                                 
                                                             | 
                                                        
                    |
| 2020 | 43 | 
                                                                 
                                    
                                    5.1%
                                 
                                                             | 
                                                        
                    |
| 2021 | 71 | 
                                                                 
                                    
                                    8.5%
                                 
                                                             | 
                                                        
                    |
| 2022 | 65 | 
                                                                 
                                    
                                    7.8%
                                 
                                                             | 
                                                        
                    |
| 2023 | 426 | 
                                                                 
                                    
                                    51%
                                 
                                                             | 
                                                        
                    |
| 2024 | 127 | 
                                                                 
                                    
                                    15.2%
                                 
                                                             | 
                                                        
                    |
| Sysmiss | 682 |