Just a quick one - promise.
Mayor Bloomberg of NYC on the www.nyc.gov site in his "State of the city" boasts that NYC had 44 Million visitors. Thats pretty good going considering that the number of people in the whole of South Africa is 44 Million and the number of people in Australia is 25 Million.
So, essentially the whole of South Africa could have visited New York. Or the whole of Australia could- twice in one year.
Coincidently, the number of people living in NYC is 8.2 Million - which is roughly the number of visitors (estimated, very badly by yours truly, but probably rather accurate) to South Africa in a year.