Oh yea, the JK far out numbers the TJ. The TJ hasn't been made in 11 years where as the JK is in full fledged production. The JKU is basically a suv and far more comfortable for a family than a TJ. Not shocking the disparity in what's on the road.
I have been to Auckland once for a biz meeting so I didn’t get to see much, but what I saw was very nice. Been to Australia many times because I was responsible for a group of software support folk. I also did a bunch of diving on the Great Barrier Reef several times. I really like your part of the world!
TJs averaged about 80K per year. JKUs have averaged closer to 160K per year. 2015? JK/JKUs sold over 200K. Now you know why Jeep/Chrysler/Fiat have not introduced the JL yet..... and why the new JL they say is coming looks like a JKU with LED lights.
Here in Phoenix there's definitely more of the JK/JKUs than anything else - but what is neat here is that there are still a lot of TJs, CJs, and even older models going down the road. I know I've even seen a Scrambler or two in the past. Even the rare original Willys Jeep. I think it's because nothing ever rusts out here, and so people can keep it all running and having fun with 'em longer.