They are talking about nonsmoking population of Asian women

had lung cancer--

"Lung cancer is the leading cause of cancer deaths worldwide, and its incidence and mortality rates vary across regions. In Asia, lung cancer mortality has been increasing for the past 20 years. Asian American women who have never smoked are almost twice as likely to get lung cancer as other ethnic groups, with more than 50% of Asian American women diagnosed with lung cancer having never smoked. For Chinese and Indian American women who have lung cancer, that number is as high as 80% to 90%."