A better comparison might be this Australian survey carried out in October 2016 by Roy Morgan Research for the Australian Research Council and Macquarie University.
It found that only 8% of Australians 14+ had "not read all or part of a print book, ebook or audio book for pleasure or interest in the last twelve months"
So that is 92% of Australians 14+ who had read or started to read a book for pleasure or interst in the last 12 months, to put it in similar terms to the New Zealand survey result.
Summary (PDF)
Full report (PDF)