| Value | Category | Cases | |
|---|---|---|---|
| -9 | Don't know (spontaneous) | 10 | 
                                    
                                    1.3%
                                 | 
| 0 | 148 | 
                                    
                                    19.1%
                                 | |
| 1 | 64 | 
                                    
                                    8.3%
                                 | |
| 2 | 102 | 
                                    
                                    13.2%
                                 | |
| 3 | 82 | 
                                    
                                    10.6%
                                 | |
| 4 | 38 | 
                                    
                                    4.9%
                                 | |
| 5 | 61 | 
                                    
                                    7.9%
                                 | |
| 6 | 26 | 
                                    
                                    3.4%
                                 | |
| 7 | 11 | 
                                    
                                    1.4%
                                 | |
| 8 | 24 | 
                                    
                                    3.1%
                                 | |
| 9 | 6 | 
                                    
                                    0.8%
                                 | |
| 10 | 35 | 
                                    
                                    4.5%
                                 | |
| 11 | 1 | 
                                    
                                    0.1%
                                 | |
| 12 | 1 | 
                                    
                                    0.1%
                                 | |
| 13 | 4 | 
                                    
                                    0.5%
                                 | |
| 14 | 4 | 
                                    
                                    0.5%
                                 | |
| 15 | 16 | 
                                    
                                    2.1%
                                 | |
| 16 | 3 | 
                                    
                                    0.4%
                                 | |
| 18 | 3 | 
                                    
                                    0.4%
                                 | |
| 19 | 1 | 
                                    
                                    0.1%
                                 | |
| 20 | 18 | 
                                    
                                    2.3%
                                 | |
| 21 | 2 | 
                                    
                                    0.3%
                                 | |
| 22 | 1 | 
                                    
                                    0.1%
                                 | |
| 23 | 1 | 
                                    
                                    0.1%
                                 | |
| 24 | 3 | 
                                    
                                    0.4%
                                 | |
| 25 | 13 | 
                                    
                                    1.7%
                                 | |
| 26 | 3 | 
                                    
                                    0.4%
                                 | |
| 27 | 1 | 
                                    
                                    0.1%
                                 | |
| 30 | 14 | 
                                    
                                    1.8%
                                 | |
| 31 | 1 | 
                                    
                                    0.1%
                                 | |
| 32 | 1 | 
                                    
                                    0.1%
                                 | |
| 34 | 2 | 
                                    
                                    0.3%
                                 | |
| 35 | 4 | 
                                    
                                    0.5%
                                 | |
| 39 | 1 | 
                                    
                                    0.1%
                                 | |
| 40 | 11 | 
                                    
                                    1.4%
                                 | |
| 41 | 1 | 
                                    
                                    0.1%
                                 | |
| 45 | 4 | 
                                    
                                    0.5%
                                 | |
| 48 | 1 | 
                                    
                                    0.1%
                                 | |
| 50 | 9 | 
                                    
                                    1.2%
                                 | |
| 58 | 1 | 
                                    
                                    0.1%
                                 | |
| 60 | 4 | 
                                    
                                    0.5%
                                 | |
| 65 | 1 | 
                                    
                                    0.1%
                                 | |
| 70 | 7 | 
                                    
                                    0.9%
                                 | |
| 75 | 2 | 
                                    
                                    0.3%
                                 | |
| 77 | 3 | 
                                    
                                    0.4%
                                 | |
| 80 | 4 | 
                                    
                                    0.5%
                                 | |
| 85 | 1 | 
                                    
                                    0.1%
                                 | |
| 86 | 1 | 
                                    
                                    0.1%
                                 | |
| 90 | 3 | 
                                    
                                    0.4%
                                 | |
| 100 | 3 | 
                                    
                                    0.4%
                                 | |
| 120 | 2 | 
                                    
                                    0.3%
                                 | |
| 130 | 1 | 
                                    
                                    0.1%
                                 | |
| 135 | 1 | 
                                    
                                    0.1%
                                 | |
| 140 | 1 | 
                                    
                                    0.1%
                                 | |
| 150 | 2 | 
                                    
                                    0.3%
                                 | |
| 160 | 1 | 
                                    
                                    0.1%
                                 | |
| 166 | 1 | 
                                    
                                    0.1%
                                 | |
| 250 | 1 | 
                                    
                                    0.1%
                                 | |
| 300 | 1 | 
                                    
                                    0.1%
                                 | |
| 500 | 1 | 
                                    
                                    0.1%
                                 | |
| Sysmiss | 643 |