| Value | Category | Cases | |
|---|---|---|---|
| -9 | Don't know (spontaneous) | 42 | 
                                    
                                    11.5%
                                 | 
| 0 | 116 | 
                                    
                                    31.9%
                                 | |
| 1 | 16 | 
                                    
                                    4.4%
                                 | |
| 2 | 27 | 
                                    
                                    7.4%
                                 | |
| 3 | 9 | 
                                    
                                    2.5%
                                 | |
| 4 | 12 | 
                                    
                                    3.3%
                                 | |
| 5 | 6 | 
                                    
                                    1.6%
                                 | |
| 7 | 6 | 
                                    
                                    1.6%
                                 | |
| 8 | 5 | 
                                    
                                    1.4%
                                 | |
| 9 | 7 | 
                                    
                                    1.9%
                                 | |
| 10 | 11 | 
                                    
                                    3%
                                 | |
| 11 | 1 | 
                                    
                                    0.3%
                                 | |
| 12 | 3 | 
                                    
                                    0.8%
                                 | |
| 13 | 2 | 
                                    
                                    0.5%
                                 | |
| 14 | 3 | 
                                    
                                    0.8%
                                 | |
| 15 | 7 | 
                                    
                                    1.9%
                                 | |
| 17 | 1 | 
                                    
                                    0.3%
                                 | |
| 18 | 4 | 
                                    
                                    1.1%
                                 | |
| 19 | 1 | 
                                    
                                    0.3%
                                 | |
| 20 | 7 | 
                                    
                                    1.9%
                                 | |
| 21 | 2 | 
                                    
                                    0.5%
                                 | |
| 22 | 2 | 
                                    
                                    0.5%
                                 | |
| 23 | 1 | 
                                    
                                    0.3%
                                 | |
| 24 | 6 | 
                                    
                                    1.6%
                                 | |
| 26 | 2 | 
                                    
                                    0.5%
                                 | |
| 27 | 3 | 
                                    
                                    0.8%
                                 | |
| 28 | 2 | 
                                    
                                    0.5%
                                 | |
| 29 | 1 | 
                                    
                                    0.3%
                                 | |
| 30 | 5 | 
                                    
                                    1.4%
                                 | |
| 31 | 2 | 
                                    
                                    0.5%
                                 | |
| 32 | 2 | 
                                    
                                    0.5%
                                 | |
| 35 | 1 | 
                                    
                                    0.3%
                                 | |
| 37 | 1 | 
                                    
                                    0.3%
                                 | |
| 38 | 1 | 
                                    
                                    0.3%
                                 | |
| 39 | 1 | 
                                    
                                    0.3%
                                 | |
| 40 | 4 | 
                                    
                                    1.1%
                                 | |
| 43 | 1 | 
                                    
                                    0.3%
                                 | |
| 44 | 1 | 
                                    
                                    0.3%
                                 | |
| 45 | 3 | 
                                    
                                    0.8%
                                 | |
| 49 | 2 | 
                                    
                                    0.5%
                                 | |
| 50 | 3 | 
                                    
                                    0.8%
                                 | |
| 52 | 1 | 
                                    
                                    0.3%
                                 | |
| 53 | 1 | 
                                    
                                    0.3%
                                 | |
| 55 | 2 | 
                                    
                                    0.5%
                                 | |
| 56 | 1 | 
                                    
                                    0.3%
                                 | |
| 58 | 1 | 
                                    
                                    0.3%
                                 | |
| 59 | 1 | 
                                    
                                    0.3%
                                 | |
| 60 | 2 | 
                                    
                                    0.5%
                                 | |
| 64 | 1 | 
                                    
                                    0.3%
                                 | |
| 65 | 2 | 
                                    
                                    0.5%
                                 | |
| 69 | 1 | 
                                    
                                    0.3%
                                 | |
| 72 | 1 | 
                                    
                                    0.3%
                                 | |
| 74 | 1 | 
                                    
                                    0.3%
                                 | |
| 75 | 1 | 
                                    
                                    0.3%
                                 | |
| 79 | 1 | 
                                    
                                    0.3%
                                 | |
| 80 | 1 | 
                                    
                                    0.3%
                                 | |
| 82 | 1 | 
                                    
                                    0.3%
                                 | |
| 115 | 1 | 
                                    
                                    0.3%
                                 | |
| 135 | 1 | 
                                    
                                    0.3%
                                 | |
| 150 | 2 | 
                                    
                                    0.5%
                                 | |
| 160 | 1 | 
                                    
                                    0.3%
                                 | |
| 169 | 1 | 
                                    
                                    0.3%
                                 | |
| 190 | 1 | 
                                    
                                    0.3%
                                 | |
| 200 | 1 | 
                                    
                                    0.3%
                                 | |
| 210 | 1 | 
                                    
                                    0.3%
                                 | |
| 287 | 1 | 
                                    
                                    0.3%
                                 | |
| 326 | 1 | 
                                    
                                    0.3%
                                 | |
| 330 | 1 | 
                                    
                                    0.3%
                                 | |
| 359 | 1 | 
                                    
                                    0.3%
                                 | |
| Sysmiss | 591 |