Obamacare has been the biggest headline in health care news since before the law got passed. From the disastrous rollout of health care.gov to the pitched political battles in Congress, the law has been a huge news item that everyone has wanted to know more about.

And finally, we have some insight into why the Obamacare exchanges enrolled so many people.

Simply put, a lot of people signed up -- over 8 million. More even than Obamacare bulls expected -- more even than Health and Human Services had hoped for.

And, according to the early numbers we've heard from insurers, most people (around 80%) are paying their premiums. So the vast majority of those sign-ups look likely to stick. What's more, according to a recent poll from the Henry J. Kaiser Family Foundation, about 60% of enrollees didn't previously have insurance, and according to a recent Gallup poll, those newly enrolled on the exchanges skew younger than the age distribution of the U.S. population.

But, of course, let's not forget the (truncated) official name of Obamacare -- the Affordable Care Act (emphasis mine).

Did the law succeed in making insurance, well, affordable? And what part did the infamous government subsidies play? In the video below, health care analysts Michael Douglass and David Williamson share exciting data that may help answer these crucial questions.

David Williamson owns shares of UnitedHealth Group. Michael Douglass has no position in any stocks mentioned. The Motley Fool recommends UnitedHealth Group and WellPoint. The Motley Fool owns shares of WellPoint. Try any of our Foolish newsletter services free for 30 days. We Fools may not all hold the same opinions, but we all believe that considering a diverse range of insights makes us better investors. The Motley Fool has a disclosure policy.