| Value | Category | Cases | |
|---|---|---|---|
| -9 | Don't know (spontaneous) | 1 | 
                                    
                                    0.3%
                                 | 
| 0 | 35 | 
                                    
                                    9.7%
                                 | |
| 1 | 43 | 
                                    
                                    11.9%
                                 | |
| 2 | 39 | 
                                    
                                    10.8%
                                 | |
| 3 | 30 | 
                                    
                                    8.3%
                                 | |
| 4 | 21 | 
                                    
                                    5.8%
                                 | |
| 5 | 22 | 
                                    
                                    6.1%
                                 | |
| 6 | 14 | 
                                    
                                    3.9%
                                 | |
| 7 | 6 | 
                                    
                                    1.7%
                                 | |
| 8 | 11 | 
                                    
                                    3.1%
                                 | |
| 9 | 10 | 
                                    
                                    2.8%
                                 | |
| 10 | 10 | 
                                    
                                    2.8%
                                 | |
| 11 | 1 | 
                                    
                                    0.3%
                                 | |
| 12 | 10 | 
                                    
                                    2.8%
                                 | |
| 13 | 2 | 
                                    
                                    0.6%
                                 | |
| 14 | 8 | 
                                    
                                    2.2%
                                 | |
| 15 | 9 | 
                                    
                                    2.5%
                                 | |
| 16 | 2 | 
                                    
                                    0.6%
                                 | |
| 17 | 3 | 
                                    
                                    0.8%
                                 | |
| 18 | 3 | 
                                    
                                    0.8%
                                 | |
| 20 | 4 | 
                                    
                                    1.1%
                                 | |
| 21 | 2 | 
                                    
                                    0.6%
                                 | |
| 22 | 1 | 
                                    
                                    0.3%
                                 | |
| 24 | 2 | 
                                    
                                    0.6%
                                 | |
| 25 | 7 | 
                                    
                                    1.9%
                                 | |
| 26 | 1 | 
                                    
                                    0.3%
                                 | |
| 28 | 1 | 
                                    
                                    0.3%
                                 | |
| 30 | 5 | 
                                    
                                    1.4%
                                 | |
| 31 | 1 | 
                                    
                                    0.3%
                                 | |
| 33 | 1 | 
                                    
                                    0.3%
                                 | |
| 34 | 1 | 
                                    
                                    0.3%
                                 | |
| 35 | 3 | 
                                    
                                    0.8%
                                 | |
| 36 | 2 | 
                                    
                                    0.6%
                                 | |
| 38 | 1 | 
                                    
                                    0.3%
                                 | |
| 40 | 5 | 
                                    
                                    1.4%
                                 | |
| 42 | 2 | 
                                    
                                    0.6%
                                 | |
| 44 | 1 | 
                                    
                                    0.3%
                                 | |
| 45 | 5 | 
                                    
                                    1.4%
                                 | |
| 47 | 1 | 
                                    
                                    0.3%
                                 | |
| 48 | 3 | 
                                    
                                    0.8%
                                 | |
| 50 | 2 | 
                                    
                                    0.6%
                                 | |
| 53 | 2 | 
                                    
                                    0.6%
                                 | |
| 55 | 2 | 
                                    
                                    0.6%
                                 | |
| 59 | 1 | 
                                    
                                    0.3%
                                 | |
| 60 | 7 | 
                                    
                                    1.9%
                                 | |
| 75 | 1 | 
                                    
                                    0.3%
                                 | |
| 77 | 1 | 
                                    
                                    0.3%
                                 | |
| 80 | 3 | 
                                    
                                    0.8%
                                 | |
| 83 | 1 | 
                                    
                                    0.3%
                                 | |
| 84 | 1 | 
                                    
                                    0.3%
                                 | |
| 85 | 1 | 
                                    
                                    0.3%
                                 | |
| 90 | 2 | 
                                    
                                    0.6%
                                 | |
| 95 | 1 | 
                                    
                                    0.3%
                                 | |
| 96 | 1 | 
                                    
                                    0.3%
                                 | |
| 100 | 1 | 
                                    
                                    0.3%
                                 | |
| 141 | 1 | 
                                    
                                    0.3%
                                 | |
| 165 | 1 | 
                                    
                                    0.3%
                                 | |
| 278 | 1 | 
                                    
                                    0.3%
                                 | |
| 280 | 1 | 
                                    
                                    0.3%
                                 | |
| Sysmiss | 240 |