The Economic Policy Institute (EPI) released a report outlining a 6.4 percent decline in employer-sponsored health insurance from 2000 to 2008 and predicting a further decline through 2010 due to rising unemployment.  In addition, the report contains state-level data on employer-sponsored health coverage trends

From the report:

While coverage did not decline for workers between 2006 and 2007 as the economy expanded, there were secular declines in coverage from peak to peak, 2000 to 2007. The declines since 2007 can be partially attributed to the start of the recession in December 2007 and partially to the overall trend in declining coverage. Men have lower rates of coverage than women (68.4% vs. 72.1%), and have experienced larger declines over the 2000s. Similar to the overall population, large disparities exist in ESI coverage by race and ethnicity. Over three fourths of white non-Hispanic workers are covered as compared to less than half of Hispanic workers. College graduates have far higher rates of employment based coverage than high school graduates, at 82.1% and 64.4%, respectively. In addition, high school graduates experienced declines more than twice as large as college graduates since 2000.

Full report: Employer-Sponsored Health Insurance Erosion Continues (PDF | 185.28 KB)

Economic Policy Institute. (2007). Employer-sponsored health insurance erosion continues. Unabated declines in coverage since 2000 are expected to worsen through 2009. Gould, Elise.