39 visiting now: 25 USA 
8 Singapore 
5 Canada 
2 Belgium 
1 Russia 
1 Brazil 
1 UK 
1 China 
1 Iran 
8 Singapore 5 Canada 2 Belgium 1 Russia 1 Brazil 1 UK 1 China 1 Iran 8 Singapore 5 Canada 2 Belgium 1 Russia 1 Brazil 1 UK 1 China 1 Iran