28 visiting now: 10 USA 
3 Germany 
3 India 
2 Belgium 
2 Singapore 
2 China 
1 Pakistan 
1 Romania 
1 Vietnam 
1 Canada 
1 Netherlands 
1 UK 
3 Germany 3 India 2 Belgium 2 Singapore 2 China 1 Pakistan 1 Romania 1 Vietnam 1 Canada 1 Netherlands 1 UK