In the five-yearly option, more eligible voters moved from the general roll to the Maori roll than those who shifted in the other direction. New voters of Maori descent favoured the Maori roll by nearly three to one.
On this evidence the Maori roll, which is used to calculate the number of Maori electorates, is seen by Maori New Zealanders as essential to their democratic and political interests.
In a sense the Maori option is a referendum on the Maori seats: if sufficient Maori voters switch to general seats then the Maori electorates could disappear.
Four years ago the Constitutional Review Panel completed a thorough review of New Zealand's constitutional arrangements. In its report, it said that while it had received a "large number" of submissions supporting the removal of the Maori seats it did not endorse this option.
The panel remarked: "It is inappropriate for longstanding rights of a minority to be taken away simply because that minority is outnumbered. The existence of the Maori seats does not impede or limit the rights of other New Zealanders to exercise their vote."
The panel had a similar view about having a referendum on the retention or abolition of the Maori seats.
It concluded: "The question about options for the Maori seats and Maori representation requires a more nuanced decision-making tool that takes account of minority views. The panel agrees that the decision about the future of Maori seats should remain in the hands of Maori."
The Maori seats have been a distinctive feature of New Zealand's political landscape for over a century and have survived pressure for their abolition. The panel's points about longstanding rights should be respected.