The chart shows different categories amongst currently unemployed. The light blue on the bottom represents the lost jobs that are lost permanently die to an economic structural change. You can see that it grew from about 25% in the 60s and suddenly jumped during this recession to 55% of lost jobs (Jan. 2009 data, must be much higher now). NYT – The Growing Underclass: Jobs Gone Forever.
Further Reading:
9 Professions with Worst Job Losses in 2009
The Chart of Lost and Gained Jobs During the Recession
Unemployed in an Economic Transition