No, FP, you don't have it right. Of those who voted, 47.5% on the first count voted for National. But all those who enrolled and advance voted at the same time haven't been added in yet. Plus the overseas, postal and various disability votes, another 15% added to the total.
http://www.nzherald.co.nz/nz/news/ar...ectid=11925871
There were also a lot who didn't vote at all, and you can assume that on average they're not doing so well under the current government.
Here are the approximate full numbers that voted.
http://www.elections.org.nz/news-med...neral-election
Since 78.8% of those who were eligible voted, there were about 690,000 NZers who abstained. Not quite the missing million this time.