35 visiting now: 21 USA 
5 Singapore 
3 Hong Kong 
2 UK 
2 India 
1 Slovakia 
1 Germany 
1 Russia 
5 Singapore 3 Hong Kong 2 UK 2 India 1 Slovakia 1 Germany 1 Russia 5 Singapore 3 Hong Kong 2 UK 2 India 1 Slovakia 1 Germany 1 Russia