43 visiting now: 27 USA 
8 Singapore 
6 Canada 
3 Russia 
1 Taiwan 
1 UK 
1 China 
1 Ireland 
1 Argentina 
8 Singapore 6 Canada 3 Russia 1 Taiwan 1 UK 1 China 1 Ireland 1 Argentina 8 Singapore 6 Canada 3 Russia 1 Taiwan 1 UK 1 China 1 Ireland 1 Argentina