43 visiting now: 38 USA 
2 Singapore 
2 Hong Kong 
2 Russia 
1 China 
1 UK 
1 Israel 
1 Poland 
2 Singapore 2 Hong Kong 2 Russia 1 China 1 UK 1 Israel 1 Poland 2 Singapore 2 Hong Kong 2 Russia 1 China 1 UK 1 Israel 1 Poland