53 visiting now: 30 USA 
10 Singapore 
5 UK 
2 France 
2 Russia 
1 Brazil 
1 China 
1 Vietnam 
1 Malaysia 
1 Angola 
1 Belgium 
10 Singapore 5 UK 2 France 2 Russia 1 Brazil 1 China 1 Vietnam 1 Malaysia 1 Angola 1 Belgium