But in the past two years manufacturing has been rising, mostly due to growth in the tech sector: a net increase of 7, 300 jobs, up 4.8%, in the San Jose-Sunnyvale-Santa Clara metropolitan area (the heart of Silicon Valley) from April 2010 to April 2012, according to the California Employment Development Department.

FORBES: Made In Silicon Valley

Alaska's unemployment rate is high, in large part due to significantly higher seasonal employment than any other state, according to Dan Robinson, an economist with the Alaska Department of Labor and Workforce Development.

FORBES: The Worst States For Business