49 visiting now: 25 USA 
16 Singapore 
6 China 
1 Korea 
1 Russia 
1 Taiwan 
1 UK 
1 Germany 
16 Singapore 6 China 1 Korea 1 Russia 1 Taiwan 1 UK 1 Germany 16 Singapore 6 China 1 Korea 1 Russia 1 Taiwan 1 UK 1 Germany