| Value | Category | Cases | |
|---|---|---|---|
| -9 | Don't know (spontaneous) | 81 | 
                                    
                                    22.3%
                                 | 
| 1 | 102 | 
                                    
                                    28%
                                 | |
| 2 | 49 | 
                                    
                                    13.5%
                                 | |
| 3 | 32 | 
                                    
                                    8.8%
                                 | |
| 4 | 12 | 
                                    
                                    3.3%
                                 | |
| 5 | 16 | 
                                    
                                    4.4%
                                 | |
| 6 | 9 | 
                                    
                                    2.5%
                                 | |
| 7 | 3 | 
                                    
                                    0.8%
                                 | |
| 8 | 6 | 
                                    
                                    1.6%
                                 | |
| 9 | 1 | 
                                    
                                    0.3%
                                 | |
| 10 | 9 | 
                                    
                                    2.5%
                                 | |
| 11 | 1 | 
                                    
                                    0.3%
                                 | |
| 15 | 7 | 
                                    
                                    1.9%
                                 | |
| 18 | 1 | 
                                    
                                    0.3%
                                 | |
| 20 | 3 | 
                                    
                                    0.8%
                                 | |
| 24 | 2 | 
                                    
                                    0.5%
                                 | |
| 32 | 1 | 
                                    
                                    0.3%
                                 | |
| 100 | 1 | 
                                    
                                    0.3%
                                 | |
| 500 | 1 | 
                                    
                                    0.3%
                                 | |
| 1000 | 1 | 
                                    
                                    0.3%
                                 | |
| 65000 | 1 | 
                                    
                                    0.3%
                                 | |
| 350000 | 1 | 
                                    
                                    0.3%
                                 | |
| 1000000 | 1 | 
                                    
                                    0.3%
                                 | |
| 2000000 | 1 | 
                                    
                                    0.3%
                                 | |
| 50000000 | 4 | 
                                    
                                    1.1%
                                 | |
| 60000000 | 1 | 
                                    
                                    0.3%
                                 | |
| 70000000 | 2 | 
                                    
                                    0.5%
                                 | |
| 80000000 | 1 | 
                                    
                                    0.3%
                                 | |
| 90000000 | 1 | 
                                    
                                    0.3%
                                 | |
| 100000000 | 3 | 
                                    
                                    0.8%
                                 | |
| 120000000 | 1 | 
                                    
                                    0.3%
                                 | |
| 150000000 | 2 | 
                                    
                                    0.5%
                                 | |
| 180000000 | 1 | 
                                    
                                    0.3%
                                 | |
| 200000000 | 4 | 
                                    
                                    1.1%
                                 | |
| 800000000 | 1 | 
                                    
                                    0.3%
                                 | |
| 900000000 | 1 | 
                                    
                                    0.3%
                                 | |
| Sysmiss | 1052 |