| Value | Category | Cases | |
|---|---|---|---|
| -9 | Don't know (spontaneous) | 11 | 
                                    
                                    1.7%
                                 | 
| 0 | 109 | 
                                    
                                    17%
                                 | |
| 1 | 42 | 
                                    
                                    6.5%
                                 | |
| 2 | 71 | 
                                    
                                    11%
                                 | |
| 3 | 51 | 
                                    
                                    7.9%
                                 | |
| 4 | 27 | 
                                    
                                    4.2%
                                 | |
| 5 | 67 | 
                                    
                                    10.4%
                                 | |
| 6 | 19 | 
                                    
                                    3%
                                 | |
| 7 | 17 | 
                                    
                                    2.6%
                                 | |
| 8 | 24 | 
                                    
                                    3.7%
                                 | |
| 9 | 2 | 
                                    
                                    0.3%
                                 | |
| 10 | 37 | 
                                    
                                    5.8%
                                 | |
| 11 | 3 | 
                                    
                                    0.5%
                                 | |
| 12 | 13 | 
                                    
                                    2%
                                 | |
| 13 | 3 | 
                                    
                                    0.5%
                                 | |
| 15 | 29 | 
                                    
                                    4.5%
                                 | |
| 16 | 4 | 
                                    
                                    0.6%
                                 | |
| 17 | 2 | 
                                    
                                    0.3%
                                 | |
| 18 | 1 | 
                                    
                                    0.2%
                                 | |
| 20 | 19 | 
                                    
                                    3%
                                 | |
| 21 | 1 | 
                                    
                                    0.2%
                                 | |
| 22 | 3 | 
                                    
                                    0.5%
                                 | |
| 23 | 1 | 
                                    
                                    0.2%
                                 | |
| 24 | 5 | 
                                    
                                    0.8%
                                 | |
| 25 | 9 | 
                                    
                                    1.4%
                                 | |
| 27 | 2 | 
                                    
                                    0.3%
                                 | |
| 28 | 1 | 
                                    
                                    0.2%
                                 | |
| 29 | 2 | 
                                    
                                    0.3%
                                 | |
| 30 | 13 | 
                                    
                                    2%
                                 | |
| 32 | 1 | 
                                    
                                    0.2%
                                 | |
| 35 | 1 | 
                                    
                                    0.2%
                                 | |
| 38 | 2 | 
                                    
                                    0.3%
                                 | |
| 40 | 9 | 
                                    
                                    1.4%
                                 | |
| 45 | 2 | 
                                    
                                    0.3%
                                 | |
| 50 | 16 | 
                                    
                                    2.5%
                                 | |
| 53 | 1 | 
                                    
                                    0.2%
                                 | |
| 60 | 4 | 
                                    
                                    0.6%
                                 | |
| 70 | 6 | 
                                    
                                    0.9%
                                 | |
| 85 | 1 | 
                                    
                                    0.2%
                                 | |
| 100 | 3 | 
                                    
                                    0.5%
                                 | |
| 140 | 2 | 
                                    
                                    0.3%
                                 | |
| 150 | 1 | 
                                    
                                    0.2%
                                 | |
| 154 | 1 | 
                                    
                                    0.2%
                                 | |
| 165 | 1 | 
                                    
                                    0.2%
                                 | |
| 180 | 1 | 
                                    
                                    0.2%
                                 | |
| 200 | 1 | 
                                    
                                    0.2%
                                 | |
| 320 | 1 | 
                                    
                                    0.2%
                                 | |
| 500 | 1 | 
                                    
                                    0.2%
                                 | |
| Sysmiss | 773 |