43 visiting now: 27 USA 
10 Singapore 
4 Canada 
2 Belgium 
2 Brazil 
1 China 
1 Iran 
1 UK 
10 Singapore 4 Canada 2 Belgium 2 Brazil 1 China 1 Iran 1 UK 10 Singapore 4 Canada 2 Belgium 2 Brazil 1 China 1 Iran 1 UK