The number of people who bought health insurance on their own outside of the ObamaCare exchanges surged at the beginning of the year, according to a new report. The Kaiser Family Foundation estimates between 3 million and 3.5 million new people signed up for health insurance either through insurance companies or brokers in March. It estimates a total of 15 million people now have individual insurance through the private market. Under ObamaCare, people had to have insurance by the end of March to avoid a tax penalty next year. The administration eventually extended this deadline to the middle of April to give people more time to sign up for plans.