Looking for the next big growth field? Consider getting into the marijuana business.

Retail sales of medical and recreational marijuana in the United States are expected to come in between $8 billion and $10 billion this year (a nearly 50% increase from 2017) and could reach $22 billion by 2022, according to Chris Walsh, industry analyst and editorial vice president of MJBizDaily. And that growth means there are a ton of job opportunities.

“The cannabis sector currently employs an estimated 125,000 to 160,000 full-time workers,” he said at The Marijuana Business Conference & Expo. “To put this in perspective, there are potentially more full-time marijuana industry workers than there are librarians or kindergarten teachers throughout the country – and over 6 times the number of coal miners in the U.S.”

The industry is projected to add as many as 340,000 full-time jobs by 2022, an estimated annual growth rate of 21%.

– Read the entire article at Fortune.