Women artists are hugely underrepresented on the summer music festival circuit. To find out why, and to see if the gaps were as large as we thought, HuffPost collected the lineups of 10 major music festivals for the past five years. Half of the people who attend music festivals are women, but across the festivals we looked at, the percent of women performers (single artists and all-women groups) hovered between 5 and 19 percent. Mixed-gender groups fared slightly better, but not by much. The percent of male performers (single or all-male groups) bottomed out at 66 — most festivals had an even higher percentage of men.

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