As the calendar turns to 4/20 -- the unofficial holiday for marijuana -- it’s not just weed enthusiasts who are celebrating. The number of jobs in the pot industry has surged in recent years, fueled by more states legalizing the drug. In fact, there are about as many employees of legal weed businesses as there are insurance underwriters, Web developers or nurse practitioners, according to Marijuana Business Daily. Cannabis is legal for adult recreational use in Alaska, Colorado, Oregon, Washington and the District of Columbia, and it’s available for medical purposes in 24 states.

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