Two-thirds of New Zealanders think the personal use of cannabis should be legal or decriminalised

And almost 90 percent think the same when it's used for pain relief.

The Drug Foundation-commissioned survey finds support has grown in all six areas it looked at around cannabis legalisation each year since it started in 2016.

Four of the six different activities have majority support... but two - growing cannabis for friends, and selling from a store - have less than 50 percent support.

Drug Foundation executive director, Ross Bell, says we're hardly the guinea pigs of cannabis law reform.

He says the public have seen significant reform in the US and Canada, where the sky hasn't fallen in as a result.