The latest data from the Centers for Disease Control suggests that the number of uninsured has declined roughly 22 million since 2013, and 17.8 million since 2010 (darn you, financial crisis!). And today we got data from the Census Bureau, which suggests that the number of uninsured people has fallen from 13.3 percent to 9.1 percent since 2013, or by about 12.8 million. There are other surveys too. But we hardly need more numbers.
How can everyone get such different answers? Well, for one thing, methodologies differ.
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