66 visiting now: 31 USA 
12 China 
4 Brazil 
4 India 
3 UK 
2 Netherlands 
2 Romania 
2 Singapore 
1 Bulgaria 
1 Taiwan 
1 France 
1 Pakistan 
1 Italy 
1 Germany 
12 China 4 Brazil 4 India 3 UK 2 Netherlands 2 Romania 2 Singapore 1 Bulgaria 1 Taiwan 1 France 1 Pakistan 1 Italy 1 Germany