81 visiting now: 30 USA 
23 China 
9 India 
4 Netherlands 
4 Brazil 
3 UK 
2 Spain 
2 Singapore 
1 Taiwan 
1 Germany 
1 Romania 
1 Australia 
23 China 9 India 4 Netherlands 4 Brazil 3 UK 2 Spain 2 Singapore 1 Taiwan 1 Germany 1 Romania 1 Australia