| Value | Category | Cases | |
|---|---|---|---|
| 0 | none/never | 1757 | 
                                    
                                    28.1%
                                 | 
| 1 | 801 | 
                                    
                                    12.8%
                                 | |
| 2 | 611 | 
                                    
                                    9.8%
                                 | |
| 3 | 344 | 
                                    
                                    5.5%
                                 | |
| 4 | 438 | 
                                    
                                    7%
                                 | |
| 5 | 338 | 
                                    
                                    5.4%
                                 | |
| 6 | 199 | 
                                    
                                    3.2%
                                 | |
| 7 | 208 | 
                                    
                                    3.3%
                                 | |
| 8 | 120 | 
                                    
                                    1.9%
                                 | |
| 9 | 54 | 
                                    
                                    0.9%
                                 | |
| 10 | 334 | 
                                    
                                    5.3%
                                 | |
| 11 | 15 | 
                                    
                                    0.2%
                                 | |
| 12 | 56 | 
                                    
                                    0.9%
                                 | |
| 13 | 13 | 
                                    
                                    0.2%
                                 | |
| 14 | 62 | 
                                    
                                    1%
                                 | |
| 15 | 76 | 
                                    
                                    1.2%
                                 | |
| 16 | 2 | 
                                    
                                    0%
                                 | |
| 17 | 2 | 
                                    
                                    0%
                                 | |
| 18 | 16 | 
                                    
                                    0.3%
                                 | |
| 19 | 8 | 
                                    
                                    0.1%
                                 | |
| 20 | 130 | 
                                    
                                    2.1%
                                 | |
| 21 | 12 | 
                                    
                                    0.2%
                                 | |
| 22 | 13 | 
                                    
                                    0.2%
                                 | |
| 23 | 13 | 
                                    
                                    0.2%
                                 | |
| 24 | 5 | 
                                    
                                    0.1%
                                 | |
| 25 | 43 | 
                                    
                                    0.7%
                                 | |
| 27 | 5 | 
                                    
                                    0.1%
                                 | |
| 28 | 32 | 
                                    
                                    0.5%
                                 | |
| 29 | 4 | 
                                    
                                    0.1%
                                 | |
| 30 | 550 | 
                                    
                                    8.8%
                                 | |
| Sysmiss | 8685 |