59 visiting now: 33 USA 
9 Singapore 
5 Canada 
5 China 
3 Brazil 
3 UK 
2 Czech Republic 
1 Hong Kong 
1 Indonesia 
1 Russia 
1 Saudi Arabia 
1 Germany 
1 Belgium 
9 Singapore 5 Canada 5 China 3 Brazil 3 UK 2 Czech Republic 1 Hong Kong 1 Indonesia 1 Russia 1 Saudi Arabia 1 Germany 1 Belgium