29 visiting now: 11 USA 
9 Singapore 
4 Canada 
2 Belgium 
2 UK 
2 China 
1 Iran 
1 Russia 
9 Singapore 4 Canada 2 Belgium 2 UK 2 China 1 Iran 1 Russia 9 Singapore 4 Canada 2 Belgium 2 UK 2 China 1 Iran 1 Russia