32 visiting now: 16 USA 
7 China 
3 Singapore 
2 Hong Kong 
1 Netherlands 
1 Romania 
1 Japan 
1 Korea 
7 China 3 Singapore 2 Hong Kong 1 Netherlands 1 Romania 1 Japan 1 Korea 7 China 3 Singapore 2 Hong Kong 1 Netherlands 1 Romania 1 Japan 1 Korea