72 visiting now: 36 China 
21 USA 
4 Brazil 
4 Russia 
3 France 
2 UK 
1 Netherlands 
1 Germany 
21 USA 4 Brazil 4 Russia 3 France 2 UK 1 Netherlands 1 Germany 21 USA 4 Brazil 4 Russia 3 France 2 UK 1 Netherlands 1 Germany