| Value | Category | Cases | |
|---|---|---|---|
| -9 | Don't know (spontaneous) | 33 | 
                                    
                                    9.1%
                                 | 
| 0 | 108 | 
                                    
                                    29.7%
                                 | |
| 1 | 35 | 
                                    
                                    9.6%
                                 | |
| 2 | 21 | 
                                    
                                    5.8%
                                 | |
| 3 | 18 | 
                                    
                                    4.9%
                                 | |
| 4 | 17 | 
                                    
                                    4.7%
                                 | |
| 5 | 11 | 
                                    
                                    3%
                                 | |
| 6 | 8 | 
                                    
                                    2.2%
                                 | |
| 7 | 5 | 
                                    
                                    1.4%
                                 | |
| 8 | 5 | 
                                    
                                    1.4%
                                 | |
| 9 | 6 | 
                                    
                                    1.6%
                                 | |
| 10 | 4 | 
                                    
                                    1.1%
                                 | |
| 11 | 1 | 
                                    
                                    0.3%
                                 | |
| 12 | 6 | 
                                    
                                    1.6%
                                 | |
| 13 | 4 | 
                                    
                                    1.1%
                                 | |
| 15 | 7 | 
                                    
                                    1.9%
                                 | |
| 16 | 3 | 
                                    
                                    0.8%
                                 | |
| 18 | 2 | 
                                    
                                    0.5%
                                 | |
| 20 | 6 | 
                                    
                                    1.6%
                                 | |
| 21 | 2 | 
                                    
                                    0.5%
                                 | |
| 22 | 2 | 
                                    
                                    0.5%
                                 | |
| 23 | 1 | 
                                    
                                    0.3%
                                 | |
| 24 | 2 | 
                                    
                                    0.5%
                                 | |
| 25 | 2 | 
                                    
                                    0.5%
                                 | |
| 28 | 1 | 
                                    
                                    0.3%
                                 | |
| 29 | 1 | 
                                    
                                    0.3%
                                 | |
| 30 | 6 | 
                                    
                                    1.6%
                                 | |
| 33 | 2 | 
                                    
                                    0.5%
                                 | |
| 34 | 1 | 
                                    
                                    0.3%
                                 | |
| 36 | 2 | 
                                    
                                    0.5%
                                 | |
| 37 | 1 | 
                                    
                                    0.3%
                                 | |
| 40 | 2 | 
                                    
                                    0.5%
                                 | |
| 42 | 1 | 
                                    
                                    0.3%
                                 | |
| 43 | 1 | 
                                    
                                    0.3%
                                 | |
| 46 | 1 | 
                                    
                                    0.3%
                                 | |
| 47 | 1 | 
                                    
                                    0.3%
                                 | |
| 49 | 1 | 
                                    
                                    0.3%
                                 | |
| 50 | 2 | 
                                    
                                    0.5%
                                 | |
| 55 | 1 | 
                                    
                                    0.3%
                                 | |
| 60 | 1 | 
                                    
                                    0.3%
                                 | |
| 65 | 2 | 
                                    
                                    0.5%
                                 | |
| 70 | 1 | 
                                    
                                    0.3%
                                 | |
| 78 | 1 | 
                                    
                                    0.3%
                                 | |
| 80 | 3 | 
                                    
                                    0.8%
                                 | |
| 90 | 1 | 
                                    
                                    0.3%
                                 | |
| 102 | 1 | 
                                    
                                    0.3%
                                 | |
| 106 | 1 | 
                                    
                                    0.3%
                                 | |
| 108 | 1 | 
                                    
                                    0.3%
                                 | |
| 120 | 2 | 
                                    
                                    0.5%
                                 | |
| 130 | 2 | 
                                    
                                    0.5%
                                 | |
| 150 | 1 | 
                                    
                                    0.3%
                                 | |
| 153 | 1 | 
                                    
                                    0.3%
                                 | |
| 163 | 1 | 
                                    
                                    0.3%
                                 | |
| 181 | 1 | 
                                    
                                    0.3%
                                 | |
| 200 | 3 | 
                                    
                                    0.8%
                                 | |
| 214 | 1 | 
                                    
                                    0.3%
                                 | |
| 240 | 1 | 
                                    
                                    0.3%
                                 | |
| 262 | 1 | 
                                    
                                    0.3%
                                 | |
| 270 | 1 | 
                                    
                                    0.3%
                                 | |
| 330 | 1 | 
                                    
                                    0.3%
                                 | |
| 377 | 1 | 
                                    
                                    0.3%
                                 | |
| 398 | 1 | 
                                    
                                    0.3%
                                 | |
| 1050 | 1 | 
                                    
                                    0.3%
                                 | |
| Sysmiss | 591 |