42 visiting now: 24 USA 
8 Singapore 
5 Canada 
5 Belgium 
1 China 
1 Iran 
1 Brazil 
1 Vietnam 
8 Singapore 5 Canada 5 Belgium 1 China 1 Iran 1 Brazil 1 Vietnam 8 Singapore 5 Canada 5 Belgium 1 China 1 Iran 1 Brazil 1 Vietnam