http://www.politicususa.com/2015/03/16/16-4-million-previously-uninsured-americans-gained-health-coverage-aca-effect.html
"The Gallup-Healthways Well-Being Index estimates that the national uninsured rate has plummeted from 20.3 percent, prior to the 2013 open enrollment period, to just 13.2 percent in early 2015."
