30 visiting now: 14 USA 
5 China 
5 Russia 
2 Japan 
1 Taiwan 
1 Ethiopia 
1 Singapore 
1 Hong Kong 
5 China 5 Russia 2 Japan 1 Taiwan 1 Ethiopia 1 Singapore 1 Hong Kong 5 China 5 Russia 2 Japan 1 Taiwan 1 Ethiopia 1 Singapore 1 Hong Kong