Ardern becomes New Zealand's most popular PM in a century: poll

The lowest approval rating (I think 2%) was in the early nineties when Jim Bolger was in office. Due mostly to huge public spending cuts that were deeply unpopular and contributed to our transition into MMP.

We generally rate our PM's pretty well overall, it's really hard to get the public to hate you in New Zealand. Politicians have always tried to keep the public onside since Rogernomics and Ruthanasia.