42 visiting now: 19 USA 
10 Singapore 
5 Belgium 
2 UK 
2 France 
2 India 
1 Iran 
1 Japan 
1 Canada 
1 China 
10 Singapore 5 Belgium 2 UK 2 France 2 India 1 Iran 1 Japan 1 Canada 1 China 10 Singapore 5 Belgium 2 UK 2 France 2 India 1 Iran 1 Japan 1 Canada 1 China