| Value | Category | Cases | |
|---|---|---|---|
| -9 | Don't know (spontaneous) | 6 | 
                                    
                                    2.5%
                                 | 
| 0 | 53 | 
                                    
                                    22.1%
                                 | |
| 1 | 37 | 
                                    
                                    15.4%
                                 | |
| 2 | 17 | 
                                    
                                    7.1%
                                 | |
| 3 | 17 | 
                                    
                                    7.1%
                                 | |
| 4 | 12 | 
                                    
                                    5%
                                 | |
| 5 | 15 | 
                                    
                                    6.3%
                                 | |
| 6 | 3 | 
                                    
                                    1.3%
                                 | |
| 7 | 7 | 
                                    
                                    2.9%
                                 | |
| 8 | 3 | 
                                    
                                    1.3%
                                 | |
| 9 | 1 | 
                                    
                                    0.4%
                                 | |
| 10 | 9 | 
                                    
                                    3.8%
                                 | |
| 12 | 2 | 
                                    
                                    0.8%
                                 | |
| 14 | 2 | 
                                    
                                    0.8%
                                 | |
| 15 | 4 | 
                                    
                                    1.7%
                                 | |
| 16 | 2 | 
                                    
                                    0.8%
                                 | |
| 17 | 1 | 
                                    
                                    0.4%
                                 | |
| 18 | 3 | 
                                    
                                    1.3%
                                 | |
| 19 | 3 | 
                                    
                                    1.3%
                                 | |
| 20 | 6 | 
                                    
                                    2.5%
                                 | |
| 21 | 1 | 
                                    
                                    0.4%
                                 | |
| 22 | 4 | 
                                    
                                    1.7%
                                 | |
| 23 | 1 | 
                                    
                                    0.4%
                                 | |
| 24 | 1 | 
                                    
                                    0.4%
                                 | |
| 25 | 2 | 
                                    
                                    0.8%
                                 | |
| 30 | 6 | 
                                    
                                    2.5%
                                 | |
| 33 | 1 | 
                                    
                                    0.4%
                                 | |
| 35 | 1 | 
                                    
                                    0.4%
                                 | |
| 36 | 1 | 
                                    
                                    0.4%
                                 | |
| 37 | 2 | 
                                    
                                    0.8%
                                 | |
| 40 | 2 | 
                                    
                                    0.8%
                                 | |
| 45 | 1 | 
                                    
                                    0.4%
                                 | |
| 50 | 1 | 
                                    
                                    0.4%
                                 | |
| 52 | 1 | 
                                    
                                    0.4%
                                 | |
| 55 | 1 | 
                                    
                                    0.4%
                                 | |
| 60 | 1 | 
                                    
                                    0.4%
                                 | |
| 65 | 1 | 
                                    
                                    0.4%
                                 | |
| 68 | 3 | 
                                    
                                    1.3%
                                 | |
| 80 | 1 | 
                                    
                                    0.4%
                                 | |
| 96 | 1 | 
                                    
                                    0.4%
                                 | |
| 100 | 1 | 
                                    
                                    0.4%
                                 | |
| 110 | 1 | 
                                    
                                    0.4%
                                 | |
| 175 | 1 | 
                                    
                                    0.4%
                                 | |
| 220 | 1 | 
                                    
                                    0.4%
                                 | |
| Sysmiss | 360 |