37 visiting now: 21 USA 
8 Singapore 
3 China 
2 France 
1 Iran 
1 Belgium 
1 Canada 
1 Ecuador 
8 Singapore 3 China 2 France 1 Iran 1 Belgium 1 Canada 1 Ecuador 8 Singapore 3 China 2 France 1 Iran 1 Belgium 1 Canada 1 Ecuador