About 28,000 Arizonans have signed up for health care plans under the Affordable Care Act, says a report by the U.S. Department of Health and Human Services released Monday.

The 27,943 soon to be insured residents reflect the first three months of open enrollment for the marketplace, which kicked off Oct. 1.

Nationally, close to 2.2 million people selected a health care plan.

"Americans are finding quality affordable coverage in the marketplace..." said Health and Human Services Secretary Kathleen Sebelius in her statement. "Our outreach efforts have ramped up, so whether it’s through public service announcements, events, our champions or other means, we are doing all we can to find, inform and enroll those who can benefit from the Marketplace."

HHS said the figures represent a nearly five-fold increase from October and November. There were 1.8 million sign ups in December alone.

The majority of those enrolling for coverage in the state are older than 50. In the country, about 36 percent are between 55 and 64, while 24 percent are between 18 and 34, the report said.

The report also showed that about 53 percent of those who've chosen a plan in Arizona are women.

Health insurance under ACA went into effect Jan. 1.

Read the full report here.