51 visiting now: 35 USA 
11 Canada 
5 Singapore 
3 Germany 
2 Brazil 
1 UK 
1 China 
1 Czech Republic 
1 Argentina 
11 Canada 5 Singapore 3 Germany 2 Brazil 1 UK 1 China 1 Czech Republic 1 Argentina 11 Canada 5 Singapore 3 Germany 2 Brazil 1 UK 1 China 1 Czech Republic 1 Argentina