From the abstract:
HEALTH COVERAGE ON A MONTHLY BASIS: This analysis examines employment-based health benefit coverage rates on a monthly basis from December 1995 to December 2009, to allow for more accurate identification of changes in trends, and to more clearly show the effects of recessions and unemployment on changes in coverage.
RECESSION PERIODS: The recession officially started in December 2007 and ended in December 2009. Between December 2007-August 2009 the percentage of workers with coverage in their own name fell from 60.4 percent to 55.9 percent. After August 2009, there appeared to be what might be the beginning of a recovery in the percentage of workers with employment-based coverage. By December 2009, 56.6 percent of workers had employment-based coverage.