How Yoga Became A $27 Billion Industry — And Reinvented American Spirituality Across America, students, stressed-out young professionals, CEOs and retirees are among those who have embraced yoga, fueling a $27 billion industry with more than 20 million practitioners — 83 percent of them women, says Huffington Post’s Carolyn Gregoire in her article “How Yoga Became A $27 Billion Industry — And Reinvented American Spirituality”.