Obamacare's 3rd anniversary: By the numbers

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The Affordable Care Act has been law of the land for three years now -- President Obama signed the legislation on March 23, 2010 -- but it remains a source of controversy and mystery for many Americans. Meanwhile, some of the most significant parts of the law have yet to take effect.

Three years after the enactment of Obamacare, here's a look at some key figures that shed light on the status of the law's implementation, its impact on the nation and public opinion.

37: Percent of Americans who approve of Obamacare

The Affordable Care Act was divisive from the start. Three years later, not much has changed.

A poll from the nonpartisan, nonprofit Kaiser Family Foundation, conducted March 5-10, found that just 37 percent of Americans have a favorable view of the law while 40 percent have an unfavorable view.

There's a partisan split in opinion, with 68 percent of Republicans saying they view the law unfavorably and 58 percent of Democrats saying they have a positive opinion of the law. Among independents, 31 percent have a favorable view, while 45 percent have an unfavorable view.

CBS

Meanwhile, nearly a quarter of Americans -- 23 percent -- declined to offer any opinion on the law. That may not be unreasonable, given that many people don't fully understand the law.

67: Percent of uninsured who still don't know what the law means for them

The Kaiser poll mentioned above found that, three years after it enactment, 67 percent of uninsured Americans under 65 years old (and thus not eligible for Medicare) still don't know how the Affordable Care Act will impact them. Among Americans overall, 57 percent said they didn't understand how they'd be impacted.

The poll also found that Americans still have many misconceptions about the complex, multi-faceted law. For instance, 40 percent of Americans -- including 35 percent of seniors -- still believe that the law created "death panels" to make decisions regarding end-of-life care for Medicare patients.

The idea of "death panels" gained steam as partisans stepped up their extreme rhetoric during the health care debate -- former Gov. Sarah Palin, R-Alaska, was among those using the term, while Sen. Chuck Grassley, R-Iowa, said President Obama wanted to "pull the plug on grandma."

The "death panel" reference referred to a proposal to pay doctors to counsel their Medicare patients about end-of-life issues like living wills and hospice care. After all the controversy, the idea was essentially dropped.

That, however, hasn't kept the law's opponents from using extreme rhetoric. "Let's repeal this failure before it literally kills women, kills children, kills senior citizens," Rep. Michele Bachmann, R-Minn., said of the law on the House floor Thursday. "Let's not do that. Let's love people. Let's care about people. Let's repeal it now while we can."

13: States that say they're not expanding Medicaid

One of the main parts of the health care law that has yet to take effect is the expansion of Medicaid, the joint federal-state program currently open to disabled and certain low-income people. The Affordable Care Act calls for states to open up Medicaid to anyone below 138 percent of the poverty line -- the Supreme Court, however, ruled over the summer that the Medicaid expansion shouldn't be mandatory.

There's no deadline for states to say whether or not they will expand the program, but so far, 13 have said they won't. The Obama administration has argued it expects states to eventually get on board with the idea, once they start seeing the benefits it has in other states. There may be some merit in that idea, as even conservative governors like Gov. Jan Brewer of Arizona have decided to adopt the expansion (even though other conservatives in her state have compared her to Judas for the decision).

Meanwhile, some state lawmakers skeptical of the plan to expand Medicaid are attempting to find a compromise with the federal government. Officials in Arkansas, Ohio, Florida, Louisiana, Pennsylvania and Texas have expressed interest in taking the federal funding available for the expansion and using it to pay for private insurance for low-income people.

Even though the nonpartisan Congressional Budget Office estimated that private insurance plans cost about 50 percen tmore than Medicaid programs, the Health and Human Services Department has given lawmakers in Arkansas "conceptual approval" for the plan, the New York Times reports.