Improved reporting and a better handling of historic abuse cases could be behind an increase in the number of reported sexual offences against children, police say.
The latest data released by the New Zealand Family Violence Clearinghouse shows that between 2005 and 2013 the number of reported sexual offences against children increased from 1278 to 2071.
The number of reported sexual offences against adults increased from 1187 to 1848 in the same period.
Police say more community support for victims could be a factor in the rise, but more work is needed to fully understand the increase.
Pauline Gulliver, Research Fellow at the Clearinghouse, says the figures also "show that family violence remains an important issue affecting a significant number of New Zealanders".
The data shows that between 2007 and 2013 more than half of the 176 female homicide victims were killed by a family member.
Two-thirds of those women killed by a family member were killed by either a partner or ex-partner.
A quarter of the 300 male homicide victims were killed by family members, with a third of those killed by a partner or ex-partner.
The data was collected by Government agencies, services and surveys.