Number/percentage of Americans lacking health insurance plummeting as Affordable Care Act is implemented

As this article by David Nather puts it: "The evidence is piling up now: Obamacare really does seem to be helping the uninsured." For instance, read this study (9.5 million fewer adults lacking health insurance after first ACA open enrollment period); this study (8 million more insured, with number of uninsured dropping in all states including non-Medicaid expansion states); and this study (percentage of uninsured dropping in all age groups; overall drop to 13.4% uninsured from a high of 18% about a year earlier).