26 visiting now: 12 USA 
7 China 
1 Russia 
1 Germany 
1 Taiwan 
1 Netherlands 
1 UK 
1 Brazil 
1 Poland 
7 China 1 Russia 1 Germany 1 Taiwan 1 Netherlands 1 UK 1 Brazil 1 Poland 7 China 1 Russia 1 Germany 1 Taiwan 1 Netherlands 1 UK 1 Brazil 1 Poland