| Value | Category | Cases | |
|---|---|---|---|
| -9 | Don't know (spontaneous) | 30 | 
                                    
                                    25.4%
                                 | 
| 16 | 1 | 
                                    
                                    0.8%
                                 | |
| 18 | 2 | 
                                    
                                    1.7%
                                 | |
| 25 | 3 | 
                                    
                                    2.5%
                                 | |
| 30 | 3 | 
                                    
                                    2.5%
                                 | |
| 32 | 1 | 
                                    
                                    0.8%
                                 | |
| 35 | 2 | 
                                    
                                    1.7%
                                 | |
| 40 | 2 | 
                                    
                                    1.7%
                                 | |
| 45 | 9 | 
                                    
                                    7.6%
                                 | |
| 50 | 3 | 
                                    
                                    2.5%
                                 | |
| 55 | 2 | 
                                    
                                    1.7%
                                 | |
| 60 | 8 | 
                                    
                                    6.8%
                                 | |
| 65 | 2 | 
                                    
                                    1.7%
                                 | |
| 70 | 1 | 
                                    
                                    0.8%
                                 | |
| 150 | 2 | 
                                    
                                    1.7%
                                 | |
| 200 | 4 | 
                                    
                                    3.4%
                                 | |
| 220 | 1 | 
                                    
                                    0.8%
                                 | |
| 250 | 1 | 
                                    
                                    0.8%
                                 | |
| 350 | 1 | 
                                    
                                    0.8%
                                 | |
| 380 | 1 | 
                                    
                                    0.8%
                                 | |
| 500 | 9 | 
                                    
                                    7.6%
                                 | |
| 560 | 1 | 
                                    
                                    0.8%
                                 | |
| 580 | 1 | 
                                    
                                    0.8%
                                 | |
| 600 | 3 | 
                                    
                                    2.5%
                                 | |
| 700 | 1 | 
                                    
                                    0.8%
                                 | |
| 750 | 1 | 
                                    
                                    0.8%
                                 | |
| 1000 | 5 | 
                                    
                                    4.2%
                                 | |
| 1200 | 1 | 
                                    
                                    0.8%
                                 | |
| 1250 | 1 | 
                                    
                                    0.8%
                                 | |
| 1500 | 1 | 
                                    
                                    0.8%
                                 | |
| 1750 | 1 | 
                                    
                                    0.8%
                                 | |
| 2000 | 3 | 
                                    
                                    2.5%
                                 | |
| 2500 | 2 | 
                                    
                                    1.7%
                                 | |
| 3000 | 1 | 
                                    
                                    0.8%
                                 | |
| 3206 | 1 | 
                                    
                                    0.8%
                                 | |
| 3500 | 1 | 
                                    
                                    0.8%
                                 | |
| 4000 | 2 | 
                                    
                                    1.7%
                                 | |
| 7665 | 1 | 
                                    
                                    0.8%
                                 | |
| 8500 | 1 | 
                                    
                                    0.8%
                                 | |
| 15000 | 1 | 
                                    
                                    0.8%
                                 | |
| 20000 | 1 | 
                                    
                                    0.8%
                                 | |
| Sysmiss | 1298 |