| Value | Category | Cases | |
|---|---|---|---|
| AFGHANISTAN | 1 | 
                                    
                                    0.2%
                                 | |
| ARGENTINA | 2 | 
                                    
                                    0.3%
                                 | |
| AUSTRALIA | 1 | 
                                    
                                    0.2%
                                 | |
| CANADA | 15 | 
                                    
                                    2.5%
                                 | |
| CUBA | 2 | 
                                    
                                    0.3%
                                 | |
| DENMARK | 1 | 
                                    
                                    0.2%
                                 | |
| ENGLAND | 5 | 
                                    
                                    0.8%
                                 | |
| FRANCE | 5 | 
                                    
                                    0.8%
                                 | |
| GERMANY | 1 | 
                                    
                                    0.2%
                                 | |
| ITALY | 2 | 
                                    
                                    0.3%
                                 | |
| JAPAN | 2 | 
                                    
                                    0.3%
                                 | |
| SPAIN | 9 | 
                                    
                                    1.5%
                                 | |
| SWITZERLAND | 4 | 
                                    
                                    0.7%
                                 | |
| TANZANIA | 1 | 
                                    
                                    0.2%
                                 | |
| UNITED STATES | 552 | 
                                    
                                    91.2%
                                 | |
| VENEZUELA | 2 | 
                                    
                                    0.3%
                                 |