Civil unions have proved to be almost as durable as traditional marriages in the first seven years since the legal status was introduced.
Statistics New Zealand figures provided to the Herald show that 4.4 per cent of civil unions registered in New Zealand from 2005 to the end of 2009 were dissolved by the end of last year, compared with 3.8 per cent of marriages in the same period.
The actual numbers - 82 civil unions dissolved out of 1876 - were so small that Statistics NZ demographer Anne Howard said any differences with the rate of marriage breakdown were unreliable.
Massey University Associate Professor Mark Henrickson, who leads a research project on New Zealand's gay, lesbian and bisexual communities, said the figures were no surprise.
"The percentages look close enough to say I don't think there is a difference between the civil union and marriage populations, which is not terribly surprising if people go to the effort [to formalise their relationships]," he said.
Family First lobbyist Bob McCoskrie, who opposed legalising civil unions in 2005, agreed.
"Humans are humans and conflict happens no matter what the sexuality of the relationship," he said.
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