57 visiting now: 32 USA 
8 Singapore 
3 Belgium 
3 France 
2 India 
2 Brazil 
2 UK 
2 Germany 
2 Hong Kong 
1 South Africa 
1 Iran 
1 China 
1 Latvia 
1 Argentina 
1 Poland 
1 Australia 
1 Russia 
8 Singapore 3 Belgium 3 France 2 India 2 Brazil 2 UK 2 Germany 2 Hong Kong 1 South Africa 1 Iran 1 China 1 Latvia 1 Argentina 1 Poland 1 Australia 1 Russia