TALLAHASSEE — The number of uninsured children in the U.S. has dropped to a "historic low" under the federal Affordable Care Act — but Florida, while showing improvement, still has one of the highest rates of children without coverage.

A report released last week by the Georgetown University Health Policy Institute's Center for Children and Families found that in 2014 — the first year for which numbers were available on the impact of the law known as Obamacare — 6 percent of U.S. children were uninsured, down from 7.1 percent in 2013.

In Florida, 9.3 percent of children were uninsured, down from 11.1 percent in 2013, said the report, which was based on U.S. Census data. Roughly 378,000 Floridians under age 18 lacked health care coverage in 2014, down from more than 445,000 the year before.

Florida went from being ranked 49th out of the 50 states and the District of Columbia in 2013 to 46th in 2014 for its overall percentage of uninsured children. The number of uninsured children in Florida declined from 667,758 in 2008 to 377,987 in 2014. Approximately 4.4 million children remain uninsured in the U.S.

"It (the rate) is the lowest in the six years' worth of data that I have," said Laura Brennaman, policy and research director for the advocacy group Florida CHAIN.

In Escambia County, data from the U.S. Census Bureau shows that in 2013, 5,257 children under 18 were not insured — about 8.2 percent percent of the total under-18 population. In Santa Rosa County, the figure stands at 3,688 — 10.2 percent of children.

Access to regular, preventative health care is an important indicator of a person's quality of life, something the Studer Community Institute reports on.

This year, Escambia Community Clinics asked County Commissioners for $525,000 in outside agency funding for 2016. Commissioners gave them $431,880, the same amount as last year. Chandra Smiley, director of the clinics that serve the medically needy and uninsured through primary, dental, mental health, pediatric services, said the clinics had 89,000 outpatient visits this fiscal year.

According to the report, the states that saw the greatest gains were those that had expanded Medicaid under Obamacare.

Georgetown University Health Policy Institute Center for Children and Families.

The findings show that expansion states saw a decline in the number of uninsured children of 21.7 percent, while the rate for states that didn't expand Medicaid was 11.6 percent.

"Children ride on the coattails of their parents," Brennaman said. "Children whose parents have insurance are much more likely to have insurance, too."

Joan Alker of the Georgetown Health Policy Institute said Obamacare had spread among families as some members gained coverage.

"Even states that didn't expand Medicaid saw what we like to call a 'welcome-mat effect' from the ACA generally, that you get from covering the whole family," Alker said. "But in our report we did find that states that expanded Medicaid saw a larger welcome-mat effect."

Key Florida Republican leaders have opposed Medicaid expansion, arguing that the federal program is "broken" and unlikely to keep its financial commitments to Florida.

Georgetown University Health Policy Institute Center for Children and Families.

During the 2015 session, the Florida Senate fought to use Obamacare dollars to extend coverage through private insurers, but Gov. Rick Scott and the Florida House strongly opposed the effort, and they prevailed.

A quarter of the Florida children who remain uninsured are under age 6, Brennaman said — "and that's that critical age when screening and preventive services can really have major implications for them, in terms of warding off big problems and allowing those children to reach their full potential."