48 visiting now: 24 USA 
8 China 
5 India 
3 Brazil 
2 Germany 
1 Singapore 
1 Chile 
1 Taiwan 
1 Korea 
1 Romania 
1 France 
8 China 5 India 3 Brazil 2 Germany 1 Singapore 1 Chile 1 Taiwan 1 Korea 1 Romania 1 France