27 visiting now: 8 USA 
6 China 
4 India 
3 Singapore 
2 Belgium 
1 Nigeria 
1 Pakistan 
1 Germany 
1 Taiwan 
6 China 4 India 3 Singapore 2 Belgium 1 Nigeria 1 Pakistan 1 Germany 1 Taiwan 6 China 4 India 3 Singapore 2 Belgium 1 Nigeria 1 Pakistan 1 Germany 1 Taiwan