Upwork, the largest freelancing website, today released its newest quarterly index of the hottest skills in the U.S. freelance job market. The Upwork Skills Index ranks the site’s 20 fastest-growing skills and is part of a quarterly series that sheds light on new and emerging skills freelancers are providing. This comes on the heels of the “Freelancing in America: 2017” study, the most comprehensive measure of the U.S. independent workforce, which found that 57.3 million Americans (36 percent of the U.S. workforce) freelanced in the past year and also predicts that the majority of the U.S. workforce will freelance within a decade.

This is pretty interesting data because it comes from a freelance website. Demand for Final Cut Pro grew more than 200 percent year-over-year, while Swift grew 100 percent.