The figure has alarmed a cancer professional who says Kiwi men take a "She'll be right"attitude and don't respect the risks of too much sun.
The Melanoma Foundation of New Zealand's interim chief executive, Kylie Williams, said people needed to wear a broad-spectrum sunscreen every day, all year round.
"We're just too blase in New Zealand. We're just not made for this sun. We're not made for this lack of ozone layer," she said.
Even women who used moisturiser with a sun protection factor in it were not getting the defence from ultraviolet (UV) radiation they needed, Mrs Williams said.
The official recommendation is to use a broad-spectrum sunscreen with a sun protection factor (SPF) of at least 30+ every day. It should be reapplied every two hours.
"The number one thing is to not let you or your children get burned. We have the saying, 'Haven't you learned? Don't get burned'. It could be a decade after getting burned that you develop melanoma," Mrs Williams said.
Only 19% of New Zealanders wear sunblock every day, not just during the summer, an independent Canstar Blue survey on sunscreen has found.
The survey also found nearly two-thirds of Kiwis (63%) have not had their skin checked by a specialist in the past five years.
Mrs Williams said this was not good enough, especially during the daylight-saving months, when the sun was at its harshest.
"Men just have this 'She'll be right' attitude and think they won't get burned and if they do, it won't matter," she said.
Although 70% of melanoma cases occurred in those aged 50 and over, a significant number of men and women aged between 25 and 44 also suffered from the cancer.
Those aged between 20 and 30 were the most relaxed in their attitude towards skin protection, with 64% choosing to wear sunscreen only on hot, sunny days.
The survey found people in that age group were also the least concerned about the health implications of sun damage compared with the national average.
Baby boomers were the most concerned about skin damage.
SunSmart programme manager Laurianne Reinsborough said even wearing sunscreen each day still was not enough.
People should also wear protective clothing, such as hats and long-sleeved, collared shirts, as well as staying in the shade as much as possible during the daylight-saving months.
Canstar New Zealand national manager Derek Bonnar said it was important the younger generation was reminded about the dangers of excessive sun exposure.
"I think younger Kiwis may have forgotten or just don't realise how dangerous exposure to UV rays can be and the damage they can inflict."
