28 visiting now: 10 Singapore 
6 USA 
4 Canada 
3 UK 
2 China 
1 Germany 
1 Austria 
1 Zimbabwe 
1 Finland 
6 USA 4 Canada 3 UK 2 China 1 Germany 1 Austria 1 Zimbabwe 1 Finland 6 USA 4 Canada 3 UK 2 China 1 Germany 1 Austria 1 Zimbabwe 1 Finland