| Value | Category | Cases | |
|---|---|---|---|
| -99 | Don't know | 0 | 
                                    
                                    0%
                                 | 
| -9 | Don't know (spontaneous) | 73 | 
                                    
                                    31.3%
                                 | 
| 0 | 114 | 
                                    
                                    48.9%
                                 | |
| 1000000 | 4 | 
                                    
                                    1.7%
                                 | |
| 1500000 | 1 | 
                                    
                                    0.4%
                                 | |
| 2000000 | 6 | 
                                    
                                    2.6%
                                 | |
| 2500000 | 2 | 
                                    
                                    0.9%
                                 | |
| 4000000 | 2 | 
                                    
                                    0.9%
                                 | |
| 5000000 | 5 | 
                                    
                                    2.1%
                                 | |
| 5500000 | 1 | 
                                    
                                    0.4%
                                 | |
| 6000000 | 1 | 
                                    
                                    0.4%
                                 | |
| 10000000 | 4 | 
                                    
                                    1.7%
                                 | |
| 12000000 | 4 | 
                                    
                                    1.7%
                                 | |
| 13000000 | 2 | 
                                    
                                    0.9%
                                 | |
| 15000000 | 4 | 
                                    
                                    1.7%
                                 | |
| 18000000 | 2 | 
                                    
                                    0.9%
                                 | |
| 21000000 | 1 | 
                                    
                                    0.4%
                                 | |
| 25000000 | 4 | 
                                    
                                    1.7%
                                 | |
| 30000000 | 1 | 
                                    
                                    0.4%
                                 | |
| 35000000 | 1 | 
                                    
                                    0.4%
                                 | |
| 40000000 | 1 | 
                                    
                                    0.4%
                                 | |
| Sysmiss | 127 |