72 visiting now: 38 USA 
9 China 
7 Netherlands 
5 UK 
4 India 
3 France 
3 Brazil 
2 Germany 
1 Singapore 
9 China 7 Netherlands 5 UK 4 India 3 France 3 Brazil 2 Germany 1 Singapore 9 China 7 Netherlands 5 UK 4 India 3 France 3 Brazil 2 Germany 1 Singapore