34 visiting now: 13 USA 
12 China 
3 UK 
2 Russia 
1 Taiwan 
1 Germany 
1 Romania 
1 South Africa 
12 China 3 UK 2 Russia 1 Taiwan 1 Germany 1 Romania 1 South Africa 12 China 3 UK 2 Russia 1 Taiwan 1 Germany 1 Romania 1 South Africa