Simon Collins writes in NZ Herald:
Two-thirds (66 per cent) of the 17,300 babies born in New Zealand last year with Maori ethnicity were also registered with at least one other ethnicity.
The same applies to 50 per cent of Pacific babies, 31 per cent of Asian babies and 29 per cent of European babies.
Similarly, 69 per cent of people in couples who listed Maori as one of their ethnicities in last year’s Census had partners with no Maori ethnicity, 46 per cent of Pacific people had partners with no Pacific ethnicity, 24 per cent of Asians had partners with no Asian ethnicity, and 12 per cent of Europeans had partners with no European ethnicity.
This is not new. NZ has always had a relatively high inter-marriage rate, which I think is partly why our race relations are so much better (not perfect) than say Australia and the US.
The figures are even more extraordinary for Pacific and Asian people in couples where both partners were born in New Zealand. Fully 78 per cent of such Pacific people, and 82 per cent of Asians, had partners with no Pacific or Asian ethnicity.
So first generation immigrants tend to marry their own race, but second generation generally do not.