Kaiser Foundation: “Since 1999 the Employer Health Benefits Survey has documented trends in the employer-sponsored health insurance market. Every year about two thousand private and non-federal public employers with three or more employees have completed the full survey.  Among other topics, the survey asks firms for the premium or full per person cost of their health coverage as well as the share that workers are responsible for. The graphing tool below allows users to look at changes in premiums and worker contributions for covered workers at different types of firms, over time.”