38 visiting now: 24 USA 
6 Singapore 
5 Belgium 
2 France 
1 Iran 
1 Canada 
1 UK 
1 China 
1 Hong Kong 
6 Singapore 5 Belgium 2 France 1 Iran 1 Canada 1 UK 1 China 1 Hong Kong 6 Singapore 5 Belgium 2 France 1 Iran 1 Canada 1 UK 1 China 1 Hong Kong