42 visiting now: 15 USA 
7 China 
4 Brazil 
3 Romania 
3 India 
1 Iran 
1 Bangladesh 
1 France 
1 Korea 
1 Singapore 
1 Malaysia 
1 Taiwan 
1 Iraq 
1 Netherlands 
1 Spain 
7 China 4 Brazil 3 Romania 3 India 1 Iran 1 Bangladesh 1 France 1 Korea 1 Singapore 1 Malaysia 1 Taiwan 1 Iraq 1 Netherlands 1 Spain