I had a quick look at the ABS figures and the latest I could find were 2009, when 65% of Australians went to the movies, of that 65% a little over half went to the cinema five or more times. That's pretty enthusiastic movie going.
Interestingly (for a YA/childrens publisher) 95% of 15 to 17 year olds went to the cinema. Wow. I wish that many had read a book.