51 visiting now: 27 USA 
8 China 
5 UK 
4 Brazil 
2 France 
2 Netherlands 
1 Taiwan 
1 Singapore 
1 Germany 
8 China 5 UK 4 Brazil 2 France 2 Netherlands 1 Taiwan 1 Singapore 1 Germany 8 China 5 UK 4 Brazil 2 France 2 Netherlands 1 Taiwan 1 Singapore 1 Germany