Now I know why I've always wanted to go t NZ or Australia. (Newser) It appears that our friends from Down Under are in fact up higher than North Americansa new study shows that Australians and New Zealanders are the world's top pot smokers, reports the Los Angeles Times. The Lancet found that 15% of Aussies and Kiwis ages 15-64 used some form of marijuana in 2009, as opposed to 11% of North Americans, and just 2.5% of people in Asia. Australians and New Zealanders also are the top users of amphetamines. Just look at the way we take alcohol as an integral part of everyday life. I think a lot of young people see cannabis in the same way that we see alcohol: as no big deal, as a drug just to use to have a good time, said one of the study's researchers. The study also found that up to 203 million people around the world use marijuana annually, compared to up to 56 million who use amphetamines and 21 million who use cocaine or opiates such as heroin.