| Value | Category | Cases | |
|---|---|---|---|
| -9 | Don't know (spontaneous) | 0 | 
                                    
                                    0%
                                 | 
| 0 | 23 | 
                                    
                                    6.9%
                                 | |
| 1 | 28 | 
                                    
                                    8.4%
                                 | |
| 2 | 24 | 
                                    
                                    7.2%
                                 | |
| 3 | 24 | 
                                    
                                    7.2%
                                 | |
| 4 | 21 | 
                                    
                                    6.3%
                                 | |
| 5 | 27 | 
                                    
                                    8.1%
                                 | |
| 6 | 10 | 
                                    
                                    3%
                                 | |
| 7 | 11 | 
                                    
                                    3.3%
                                 | |
| 8 | 12 | 
                                    
                                    3.6%
                                 | |
| 9 | 4 | 
                                    
                                    1.2%
                                 | |
| 10 | 21 | 
                                    
                                    6.3%
                                 | |
| 11 | 11 | 
                                    
                                    3.3%
                                 | |
| 12 | 5 | 
                                    
                                    1.5%
                                 | |
| 13 | 1 | 
                                    
                                    0.3%
                                 | |
| 14 | 2 | 
                                    
                                    0.6%
                                 | |
| 15 | 15 | 
                                    
                                    4.5%
                                 | |
| 16 | 3 | 
                                    
                                    0.9%
                                 | |
| 18 | 1 | 
                                    
                                    0.3%
                                 | |
| 19 | 3 | 
                                    
                                    0.9%
                                 | |
| 20 | 18 | 
                                    
                                    5.4%
                                 | |
| 21 | 2 | 
                                    
                                    0.6%
                                 | |
| 22 | 4 | 
                                    
                                    1.2%
                                 | |
| 23 | 2 | 
                                    
                                    0.6%
                                 | |
| 24 | 2 | 
                                    
                                    0.6%
                                 | |
| 25 | 9 | 
                                    
                                    2.7%
                                 | |
| 26 | 3 | 
                                    
                                    0.9%
                                 | |
| 27 | 1 | 
                                    
                                    0.3%
                                 | |
| 28 | 1 | 
                                    
                                    0.3%
                                 | |
| 30 | 10 | 
                                    
                                    3%
                                 | |
| 32 | 1 | 
                                    
                                    0.3%
                                 | |
| 34 | 1 | 
                                    
                                    0.3%
                                 | |
| 35 | 1 | 
                                    
                                    0.3%
                                 | |
| 36 | 1 | 
                                    
                                    0.3%
                                 | |
| 40 | 5 | 
                                    
                                    1.5%
                                 | |
| 45 | 1 | 
                                    
                                    0.3%
                                 | |
| 50 | 7 | 
                                    
                                    2.1%
                                 | |
| 52 | 1 | 
                                    
                                    0.3%
                                 | |
| 56 | 2 | 
                                    
                                    0.6%
                                 | |
| 60 | 3 | 
                                    
                                    0.9%
                                 | |
| 63 | 1 | 
                                    
                                    0.3%
                                 | |
| 75 | 1 | 
                                    
                                    0.3%
                                 | |
| 80 | 3 | 
                                    
                                    0.9%
                                 | |
| 98 | 1 | 
                                    
                                    0.3%
                                 | |
| 99 | 1 | 
                                    
                                    0.3%
                                 | |
| 100 | 2 | 
                                    
                                    0.6%
                                 | |
| 110 | 1 | 
                                    
                                    0.3%
                                 | |
| 140 | 1 | 
                                    
                                    0.3%
                                 | |
| 200 | 1 | 
                                    
                                    0.3%
                                 | |
| Sysmiss | 312 |