Drink-drive convictions have fallen by a third in five years but the percentage of repeat offenders has remained almost the same.
The Government is reviewing the penalties for drink-drive offences and campaigners say penalties need to be tougher on drunk drivers, including making ignition interlocks mandatory for recidivist drunk drivers.
In the past financial year, 18,000 people were convicted of being intoxicated behind the wheel, a drop of 35 per cent since the 2010/2011 financial year.
Rotorua and Taranaki almost halved their convictions with drops of 49 and 48 per cent respectively, Ministry of Justice figures show.
The data, given to the Herald by the Automobile Association, also highlighted the continuing struggle to stop recidivist drink drivers. Nationwide, there was a fall of just 5 per cent over five years in the number of convictions for the third or more offence. In the past financial year, 4711 people were caught who had already been prosecuted three or more times.