A third of Americans without health insurance intend to stay that way, according to a new report. Although the most common reason for doing without coverage is the expense, 70 percent of those planning to stay uninsured did not know about the subsidies afforded under Obamacare that reduce the cost.

The report by Bankrate.com shows that, despite the government’s effort to promote the new health law, also called the Affordable Care Act, many Americans seem unfamiliar with key details of the program.

“This is a staggeringly high percentage,” said Bankrate.com insurance analyst Doug Whiteman. “The government has spent over half a billion dollars promoting the Affordable Care Act, and more than two-thirds of uninsured Americans still don’t know about the subsidies.”

Some 46 percent of those surveyed also were unaware of the March 31 deadline for being insured.

Ignorance about the tax credits ran highest among Republicans and people in the West and South. More than 40 percent of people who identified themselves as Republicans said there are no tax credits to lessen the cost of insurance, compared with 20 percent of Democrats and 33 percent of independents. Slightly more than a third of those in both the West and South say the tax credits don’t exist, compared with 25 percent in the Northeast and just 13 percent in the Midwest.

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