Fifty-six percent of American adults say it's not the federal government's responsibility to ensure everyone in U.S. has health insurance, according to a new poll from Gallup.

Just 42 percent believe it is the responsibility of the government, the lowest number recorded since Gallup began tracking the opinions in 2000.

But it's not just the recent debacle of the Obamacare exchange website leading to the decline, because opinion began to shift in 2007.

“Attitudes began to shift significantly in 2007, and continued to change through the time President Barack Obama took office in 2009,” Gallup wrote. “Americans who feel health care coverage is not the federal government's responsibility have been in the clear majority the past two years.”

Until 2009, those believing the government is responsible for making sure Americans have health insurance were in the clear majority, peaking at 69 percent in 2006.