Colorado's health care system ranks sixth-best in the country, according to a new report in which researchers argue that states that fully embraced the Affordable Care Act saw the biggest improvements to their health systems.

The report, released Thursday by The Commonwealth Fund, found that Colorado's health care system jumped five spots in the organization's Scorecard on State Health System Performance from before the Affordable Care Act to the present. That was the fifth-largest jump among all states. All of top five most-improved states — which also included California, Kentucky, New York and Washington — each expanded Medicaid under the Affordable Care Act and set up state-based insurance exchanges.

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