56 visiting now: 33 USA 
6 Czech Republic 
5 Singapore 
5 Canada 
4 Brazil 
2 China 
1 Turkey 
1 UK 
1 Germany 
1 Australia 
1 Iraq 
1 Russia 
6 Czech Republic 5 Singapore 5 Canada 4 Brazil 2 China 1 Turkey 1 UK 1 Germany 1 Australia 1 Iraq 1 Russia