63 visiting now: 29 USA 
8 Brazil 
7 Singapore 
4 Canada 
4 China 
4 Belgium 
3 UK 
2 Germany 
2 Argentina 
1 Saudi Arabia 
1 Vietnam 
1 South Africa 
1 Spain 
1 Korea 
1 Russia 
8 Brazil 7 Singapore 4 Canada 4 China 4 Belgium 3 UK 2 Germany 2 Argentina 1 Saudi Arabia 1 Vietnam 1 South Africa 1 Spain 1 Korea 1 Russia