43 visiting now: 39 USA 
3 Russia 
3 Singapore 
2 China 
2 UK 
2 Finland 
1 South Africa 
1 Germany 
3 Russia 3 Singapore 2 China 2 UK 2 Finland 1 South Africa 1 Germany 3 Russia 3 Singapore 2 China 2 UK 2 Finland 1 South Africa 1 Germany