*Distribution is statistically different from the previous year shown at p<.05. No statistical tests were conducted for years prior to 1999.
^Information was not obtained for POS plans in 1988.
Note: A portion of the change in enrollment for 2005 is likely attributable to incorporating more recent Census Bureau estimates of the number of state and local government workers and removing federal workers from the weights.
Source: Kaiser/HRET Survey of Employer-Sponsored Health Benefits, 1999-2005; KPMG Survey of Employer-Sponsored Health Benefits, 1993, 1996, 1998; The Health Insurance Association of America (HIAA), 1988. From Exhibit 5.1, at http://www.kff.org/insurance/7315/sections/ehbs05-5-1.cfm.