Sally Kohn is a progressive activist, columnist and television commentator. Follow her on Twitter @sallykohn. The opinions expressed in this commentary are solely those of the author. More than 6 million Americans signed up for Obamacare before the March 31 deadline to get private health insurance through the Affordable Care Act exchanges. This is great news for the Obama administration. But there are millions more reasons to celebrate Obamacare. Actually, at the writing of this essay, there are more than 317 million reasons — because that's the population of the United States of America and every single one of us can benefit from health care reform. How? Here's a rundown by the numbers: That's how many young adults can get coverage because of the provision in Obamacare that allows them to stay on their parents' insurance plans until age 26. That's how many Americans no longer have lifetime expense caps, whether it's because they have chronic illnesses or because their insurance company set restrictive policies.