56 visiting now: 35 USA 
8 Singapore 
4 Canada 
3 Germany 
2 Hong Kong 
2 Czech Republic 
1 Brazil 
1 India 
1 UK 
1 Japan 
1 China 
1 Latvia 
1 Australia 
1 Lithuania 
1 Belgium 
1 Russia 
8 Singapore 4 Canada 3 Germany 2 Hong Kong 2 Czech Republic 1 Brazil 1 India 1 UK 1 Japan 1 China 1 Latvia 1 Australia 1 Lithuania 1 Belgium 1 Russia