| Value | Category | Cases | |
|---|---|---|---|
| -99 | Don't Know | 2 | 
                                    
                                    1.6%
                                 | 
| 0 | 1 | 
                                    
                                    0.8%
                                 | |
| 2 | 2 | 
                                    
                                    1.6%
                                 | |
| 3 | 1 | 
                                    
                                    0.8%
                                 | |
| 4 | 1 | 
                                    
                                    0.8%
                                 | |
| 5 | 2 | 
                                    
                                    1.6%
                                 | |
| 10 | 1 | 
                                    
                                    0.8%
                                 | |
| 15 | 3 | 
                                    
                                    2.4%
                                 | |
| 20 | 8 | 
                                    
                                    6.3%
                                 | |
| 22 | 6 | 
                                    
                                    4.8%
                                 | |
| 23 | 4 | 
                                    
                                    3.2%
                                 | |
| 24 | 18 | 
                                    
                                    14.3%
                                 | |
| 25 | 39 | 
                                    
                                    31%
                                 | |
| 26 | 33 | 
                                    
                                    26.2%
                                 | |
| 30 | 5 | 
                                    
                                    4%
                                 | |
| Sysmiss | 2 |