43 visiting now: 24 USA 
8 Singapore 
6 China 
4 France 
2 Brazil 
1 Vietnam 
1 Poland 
1 Russia 
1 UK 
1 Ethiopia 
8 Singapore 6 China 4 France 2 Brazil 1 Vietnam 1 Poland 1 Russia 1 UK 1 Ethiopia 8 Singapore 6 China 4 France 2 Brazil 1 Vietnam 1 Poland 1 Russia 1 UK 1 Ethiopia