| Value | Category | Cases | |
|---|---|---|---|
| -99 | Don't know | 1 | 
                                    
                                    0.9%
                                 | 
| 1 | 5 | 
                                    
                                    4.3%
                                 | |
| 2 | 16 | 
                                    
                                    13.7%
                                 | |
| 3 | 16 | 
                                    
                                    13.7%
                                 | |
| 4 | 25 | 
                                    
                                    21.4%
                                 | |
| 5 | 17 | 
                                    
                                    14.5%
                                 | |
| 6 | 12 | 
                                    
                                    10.3%
                                 | |
| 7 | 3 | 
                                    
                                    2.6%
                                 | |
| 8 | 6 | 
                                    
                                    5.1%
                                 | |
| 9 | 1 | 
                                    
                                    0.9%
                                 | |
| 10 | 4 | 
                                    
                                    3.4%
                                 | |
| 12 | 7 | 
                                    
                                    6%
                                 | |
| 15 | 2 | 
                                    
                                    1.7%
                                 | |
| 20 | 1 | 
                                    
                                    0.9%
                                 | |
| 24 | 1 | 
                                    
                                    0.9%
                                 | |
| Sysmiss | 11 |