25 visiting now: 12 USA 
3 Singapore 
2 India 
2 France 
2 China 
1 Czech Republic 
1 Germany 
1 Taiwan 
1 Hong Kong 
3 Singapore 2 India 2 France 2 China 1 Czech Republic 1 Germany 1 Taiwan 1 Hong Kong 3 Singapore 2 India 2 France 2 China 1 Czech Republic 1 Germany 1 Taiwan 1 Hong Kong