Defenders of the Affordable Care Act received good news Wednesday morning.

According to the National Center for Health Statistics, 2.5 million young adults received health insurance, thanks to a provision in the laws which allows people under 26-years-old to stay on their parents' insurance.

The percentage of 19 to 25-year-olds with health insurance increased from 64 percent to 73 percent from September 2010 to June 2011, the agency said. Coverage for 26 to 35-year-olds was unchanged at 72 percent during the same time.

"This comparison makes it clear that the increase in coverage among 19 to 25 year-olds can be directly attributed to the Affordable Care Act’s new dependent-coverage provision," the Health and Human Services Department said.

Most of the Affordable Care Act's provisions won't be implemented until 2014. Currently there are 50.7 million Americans uninsured.