59 visiting now: 32 USA 
9 Canada 
8 Singapore 
4 UK 
4 Czech Republic 
2 Germany 
2 Japan 
1 China 
1 Argentina 
1 Belgium 
1 Brazil 
9 Canada 8 Singapore 4 UK 4 Czech Republic 2 Germany 2 Japan 1 China 1 Argentina 1 Belgium 1 Brazil