61 visiting now: 28 USA 
8 Brazil 
6 Singapore 
5 Canada 
4 China 
4 Belgium 
3 UK 
2 Germany 
2 Russia 
1 Vietnam 
1 South Africa 
1 Argentina 
1 Spain 
1 Korea 
1 Saudi Arabia 
8 Brazil 6 Singapore 5 Canada 4 China 4 Belgium 3 UK 2 Germany 2 Russia 1 Vietnam 1 South Africa 1 Argentina 1 Spain 1 Korea 1 Saudi Arabia