That's based on industry growth rates between 2007 and 2011. Newspapers fell 28.4 percent during that period (even worse than building materials), while renewables and environment had the fastest growth rate at 49.2 percent, followed by the Internet. From Scott Nicholson at LinkedIn:
In terms of post-recession recovery, IT, marketing & advertising, computer software, and insurance are the largest industries that fell heading towards the end of the recession in 2009 but in 2011 are at or above their 2007 employment level. Financial services is starting its recovery and real estate appears to have bottomed out. Several industries such as newspapers, supermarkets and telecom have continued to shrink throughout the sample period.