| Value | Category | Cases | |
|---|---|---|---|
| -9 | Don't know (spontaneous) | 216 | 
                                    
                                    54.5%
                                 | 
| 0 | 1 | 
                                    
                                    0.3%
                                 | |
| 3 | 1 | 
                                    
                                    0.3%
                                 | |
| 10 | 2 | 
                                    
                                    0.5%
                                 | |
| 20 | 2 | 
                                    
                                    0.5%
                                 | |
| 30 | 1 | 
                                    
                                    0.3%
                                 | |
| 35 | 1 | 
                                    
                                    0.3%
                                 | |
| 40 | 1 | 
                                    
                                    0.3%
                                 | |
| 70 | 1 | 
                                    
                                    0.3%
                                 | |
| 80 | 2 | 
                                    
                                    0.5%
                                 | |
| 100 | 11 | 
                                    
                                    2.8%
                                 | |
| 120 | 2 | 
                                    
                                    0.5%
                                 | |
| 125 | 1 | 
                                    
                                    0.3%
                                 | |
| 150 | 4 | 
                                    
                                    1%
                                 | |
| 160 | 1 | 
                                    
                                    0.3%
                                 | |
| 200 | 6 | 
                                    
                                    1.5%
                                 | |
| 250 | 2 | 
                                    
                                    0.5%
                                 | |
| 300 | 9 | 
                                    
                                    2.3%
                                 | |
| 350 | 4 | 
                                    
                                    1%
                                 | |
| 400 | 4 | 
                                    
                                    1%
                                 | |
| 416 | 1 | 
                                    
                                    0.3%
                                 | |
| 417 | 1 | 
                                    
                                    0.3%
                                 | |
| 450 | 2 | 
                                    
                                    0.5%
                                 | |
| 490 | 1 | 
                                    
                                    0.3%
                                 | |
| 500 | 28 | 
                                    
                                    7.1%
                                 | |
| 520 | 1 | 
                                    
                                    0.3%
                                 | |
| 530 | 1 | 
                                    
                                    0.3%
                                 | |
| 550 | 2 | 
                                    
                                    0.5%
                                 | |
| 600 | 8 | 
                                    
                                    2%
                                 | |
| 700 | 2 | 
                                    
                                    0.5%
                                 | |
| 750 | 3 | 
                                    
                                    0.8%
                                 | |
| 800 | 3 | 
                                    
                                    0.8%
                                 | |
| 860 | 1 | 
                                    
                                    0.3%
                                 | |
| 1000 | 25 | 
                                    
                                    6.3%
                                 | |
| 1100 | 1 | 
                                    
                                    0.3%
                                 | |
| 1200 | 3 | 
                                    
                                    0.8%
                                 | |
| 1500 | 6 | 
                                    
                                    1.5%
                                 | |
| 1600 | 1 | 
                                    
                                    0.3%
                                 | |
| 2000 | 10 | 
                                    
                                    2.5%
                                 | |
| 2500 | 2 | 
                                    
                                    0.5%
                                 | |
| 3000 | 2 | 
                                    
                                    0.5%
                                 | |
| 4000 | 1 | 
                                    
                                    0.3%
                                 | |
| 4250 | 1 | 
                                    
                                    0.3%
                                 | |
| 5000 | 2 | 
                                    
                                    0.5%
                                 | |
| 6000 | 1 | 
                                    
                                    0.3%
                                 | |
| 6500 | 1 | 
                                    
                                    0.3%
                                 | |
| 10000 | 3 | 
                                    
                                    0.8%
                                 | |
| 12000 | 1 | 
                                    
                                    0.3%
                                 | |
| 15000 | 1 | 
                                    
                                    0.3%
                                 | |
| 20000 | 5 | 
                                    
                                    1.3%
                                 | |
| 30000 | 1 | 
                                    
                                    0.3%
                                 | |
| 33000 | 1 | 
                                    
                                    0.3%
                                 | |
| 109000 | 1 | 
                                    
                                    0.3%
                                 | |
| 450000 | 1 | 
                                    
                                    0.3%
                                 | |
| Sysmiss | 249 |