Total URLs with tld .nz at commoncrawl for July 2019's crawl: 
6862400

Total uniq domains: 126990

About 54 pages on average *crawled* per site.


https://www.quora.com/What-is-the-average-number-of-webpages-on-a-website
https://www.internetlivestats.com/total-number-of-websites/
https://www.webnots.com/3-ways-to-find-number-of-pages-on-a-website/
"There are over 1.5 billion websites on the world wide web today. Of these, less than 200 million are active."

"It must be noted that around 75% of websites today are not active, but parked domains or similar. [1]"

https://en.wikipedia.org/wiki/Domain_parking
"Domain parking is the registration of an Internet domain name without that domain being associated with any services such as e-mail or a website."