63 visiting now: 36 USA 
9 Singapore 
4 China 
3 Germany 
3 Belgium 
3 Brazil 
3 Canada 
2 UK 
1 South Africa 
1 Iran 
1 Japan 
1 Latvia 
1 Netherlands 
1 France 
1 Australia 
9 Singapore 4 China 3 Germany 3 Belgium 3 Brazil 3 Canada 2 UK 1 South Africa 1 Iran 1 Japan 1 Latvia 1 Netherlands 1 France 1 Australia