Correction appended, July 10

The estimated annual market demand for marijuana in Colorado is roughly 130 metric tons, according to the first post-legalization study of the market.

The study, released by state regulators, used actual sales data to draw up the figure rather than rely on survey responses as studies have done in the past, and was able to provide some revealing information.

Surveys have estimated that a third of marijuana users consumed the drug less than once a month, according to the Associated Press. But the study found that those users comprise only .3 percent of the total market, meaning the most of the marijuana is consumed by heavy, more regular users.

The study’s estimate for total market demand, which includes both medical and recreational marijuana, surpassed past figures by nearly a third. The analysis found that demand from residents hovers around 121 metric tons and demand from visitors stands at around 9 metric tons.

But in some of the Colorado’s vacation spots, out-of-staters account for as much as 90 percent of the recreational dispensary traffic. According to the study, legal marijuana is, on average, going for $220 per ounce.

Correction: The original version of this story incorrectly suggested that the study contradicted previous findings about infrequent marijuana users in Colorado.

Write to Noah Rayman at noah.rayman@time.com.