Although U.S. workers of all ages and income brackets have the highest job satisfaction levels since the beginning of The Great Recession, a majority continue to be unhappy at work, according to a survey by The Conference Board.

The report found that 47.2 percent of Americans are satisfied with their jobs, an increase compared to 42.6 percent in 2010 and 45.3 percent in 2009. However, the number still remains lower than the 48.8 percent recorded in 2008.

2005 was the last year when a majority of Americans were happy at work with the percentage at 52.1 percent.

The Middle Atlantic region (New Jersey, New York, and Pennsylvania) had the lowest employee satisfaction with only 41.5 percent of workers satisfied in 2011.

The Conference Board conducted its report with the help of the Nielsen Company in the fall of 2011, based on a survey of 5,000 U.S. households.