Obamacare reached age 5 on Monday [1]. As I’ve pointed out earlier, this anemic child is not exactly a picture of health, falling behind the lofty expectations set for it on many dimensions. But the one bright spot for its proud parents relates to how much the law has reduced the number of uninsured. The president’s Council of Economic Advisors ecstatically announced last December: “the drop in the nation’s uninsured rate so far this year is the largest over any period since the early 1970s.” A little perspective is in order.

First, taking the CEA’s figures at face value (which my chart below does), this decline amounts to a 2.8 percentage point net reduction in the rate of being uninsured, that is, above and beyond the decline that would have occurred anyway according to CBO [2]. It may well be the biggest one-year decline since the 1970′s, but CBO’s expectation at the time the law was passed was that uninsured risk would drop by 6 percentage points in 2014 alone. Even as late as May 2013, CBO was expecting the net decline to be 3.5%. In short, in its first year, Obamacare scored 46% if we use CBO’s original projection as the scoring standard and 79% if we used the May 2013 projection. Clearly we would like this child to perform better than that in future years. But that would require the number of newly covered Americans to increase an additional 79% this year compared to last year.

Reality check: that is certainly not going to happen. Charles Gaba at ACASignups estimates that estimated paid sign-ups on the Exchanges are only 10.5 million so far, compared to 7.06 million last April [the original post stated 10 million, see Update #1 for explanation]. That’s only a 49% increase, suggesting Obamacare will fall even further behind CBO expectations for 2015 [the original post stated 42%, see Update #1 for explanation]. Medicaid won’t fill the gap, since Medicaid evidently is growing by about 300,000 persons per month. Even if we assume all of these are uninsured, that would reduce the uninsured rate by only 0.1% monthly, or 1.2% over 2015 as a whole. That provides only about half of what’s needed to keep pace with CBO projections, leaving the Exchanges to fill the gap. But as we’ve seen, the Exchanges are lagging behind.