48 visiting now: 37 USA 
6 Singapore 
2 China 
2 Germany 
1 Russia 
1 Canada 
1 UK 
1 Netherlands 
6 Singapore 2 China 2 Germany 1 Russia 1 Canada 1 UK 1 Netherlands 6 Singapore 2 China 2 Germany 1 Russia 1 Canada 1 UK 1 Netherlands