* Estimate is statistically different from the previous year shown at p<.05.
^ Information was not obtained for POS plans in 1988.
Source: Kaiser/HRET Survey of Employer-Sponsored Health Benefits: 2000, 2002, 2003, 2004; KPMG Survey of Employer-Sponsored Health Benefits: 1993, 1996; The Health Insurance Association of America (HIAA): 1988.