A Ministry of Transport report found 32 of the 92 unrestrained road fatalities last year nationwide may have survived had the victims wore seatbelts. Sixteen of these fatalities "very probably" could have been avoided. The 92 fatalities was a significant spike from the three years prior, when an average of 57 people died in road accidents while unrestrained.
Ms Anderson said she hoped this figure would drop as more young people were taught to wear a seatbelt every time they were in a car.
"I absolutely don't understand why people don't - particularly if you're in a vehicle with young children, you should be modelling that behaviour."
She said a fine may be the only thing to convince a sector of people who consistently choose not to buckle up.
"Whether more education is the answer ... I'm not sure. Those who consistently don't wear their seatbelts, I think enforcement's probably the influencer really."
A two-week long nationwide police sting called Operation Habit cracked down on those not buckling up or using their mobile phone while driving. The operation finished on Sunday.
"It takes next to no time to put on a seatbelt and wearing one could save your life in a crash," road policing national manager Superintendent Steve Greally said.