| Value | Category | Cases | |
|---|---|---|---|
| -9 | Don't know (spontaneous) | 7 | 
                                    
                                    4.9%
                                 | 
| 0 | 40 | 
                                    
                                    28.2%
                                 | |
| 1 | 8 | 
                                    
                                    5.6%
                                 | |
| 2 | 2 | 
                                    
                                    1.4%
                                 | |
| 3 | 8 | 
                                    
                                    5.6%
                                 | |
| 4 | 3 | 
                                    
                                    2.1%
                                 | |
| 5 | 2 | 
                                    
                                    1.4%
                                 | |
| 6 | 2 | 
                                    
                                    1.4%
                                 | |
| 7 | 1 | 
                                    
                                    0.7%
                                 | |
| 8 | 7 | 
                                    
                                    4.9%
                                 | |
| 9 | 1 | 
                                    
                                    0.7%
                                 | |
| 10 | 3 | 
                                    
                                    2.1%
                                 | |
| 12 | 4 | 
                                    
                                    2.8%
                                 | |
| 14 | 3 | 
                                    
                                    2.1%
                                 | |
| 15 | 1 | 
                                    
                                    0.7%
                                 | |
| 16 | 2 | 
                                    
                                    1.4%
                                 | |
| 18 | 1 | 
                                    
                                    0.7%
                                 | |
| 20 | 4 | 
                                    
                                    2.8%
                                 | |
| 21 | 1 | 
                                    
                                    0.7%
                                 | |
| 23 | 2 | 
                                    
                                    1.4%
                                 | |
| 25 | 2 | 
                                    
                                    1.4%
                                 | |
| 26 | 1 | 
                                    
                                    0.7%
                                 | |
| 30 | 3 | 
                                    
                                    2.1%
                                 | |
| 31 | 1 | 
                                    
                                    0.7%
                                 | |
| 35 | 3 | 
                                    
                                    2.1%
                                 | |
| 37 | 2 | 
                                    
                                    1.4%
                                 | |
| 42 | 1 | 
                                    
                                    0.7%
                                 | |
| 43 | 1 | 
                                    
                                    0.7%
                                 | |
| 45 | 1 | 
                                    
                                    0.7%
                                 | |
| 46 | 1 | 
                                    
                                    0.7%
                                 | |
| 47 | 1 | 
                                    
                                    0.7%
                                 | |
| 50 | 3 | 
                                    
                                    2.1%
                                 | |
| 60 | 2 | 
                                    
                                    1.4%
                                 | |
| 68 | 1 | 
                                    
                                    0.7%
                                 | |
| 70 | 1 | 
                                    
                                    0.7%
                                 | |
| 80 | 4 | 
                                    
                                    2.8%
                                 | |
| 100 | 1 | 
                                    
                                    0.7%
                                 | |
| 110 | 2 | 
                                    
                                    1.4%
                                 | |
| 111 | 1 | 
                                    
                                    0.7%
                                 | |
| 200 | 1 | 
                                    
                                    0.7%
                                 | |
| 215 | 1 | 
                                    
                                    0.7%
                                 | |
| 218 | 1 | 
                                    
                                    0.7%
                                 | |
| 246 | 1 | 
                                    
                                    0.7%
                                 | |
| 300 | 1 | 
                                    
                                    0.7%
                                 | |
| 327 | 1 | 
                                    
                                    0.7%
                                 | |
| 374 | 1 | 
                                    
                                    0.7%
                                 | |
| 600 | 1 | 
                                    
                                    0.7%
                                 | |
| Sysmiss | 260 |