Eager to maximize coverage under the Affordable Care Act, the Obama administration has allowed large numbers of people to sign up for insurance after the deadlines in the last two years, destabilizing insurance markets and driving up premiums, health insurance companies say.

The administration has created more than 30 “special enrollment” categories and sent emails to millions of Americans last year urging them to see if they might be able to sign up after the annual open enrollment deadline. But, insurers and state officials said, the federal government did little to verify whether late arrivals were eligible.

In most states, health insurance premiums on the individual marketplace are rising by double digits under Obamacare. 17 states will face average premium increases of 20% or more. Iowans, for instance, will see their premiums spike by 22% this year. In Minnesota, Alaska, Tennessee, and Hawaii, rates will rise by 30% or more.

Want to know where your state ranks? FreedomWorks has calculated the average rate hike and the range of premium changes individuals purchasing insurance on the individual market will face. Click below to read more.

Recently, the Obama administration said 11.3 million Americans had signed up for 2016 health exchange plans by late December.

“That’s still significantly lower than what experts had initially expected at this point in time in exchange implementation,” said Caroline Pearson, senior vice president with health care consulting firm Avalere. “We had anticipated, based on the Congressional Budget Office estimates, that perhaps 21 million people might be enrolled in 2016.”

“Many middle income people continue to suggest that exchange plans just aren’t affordable for them,” Pearson told CNBC. “Even with the subsidies, they simply can’t make the monthly premiums work in addition to all of the out of pocket costs.”

Between 1999 and 2015, premiums increased by 203%, outpacing both inflation and workers’ earnings. Between 2014 and 2015, the average premium for single and family coverage increased 4%, and over the past 5 years, deductibles increased faster than both premiums and wages.

The Obama administration so far is making little progress in getting more young adults to sign up for health policies on the federal insurance exchange, according to figures released Thursday.

26% of people who signed up for coverage as of Dec. 26 in the 38 states that use the federal exchange were ages 18 to 34, according to a report from the Centers for Medicare and Medicaid Services, which administers the law. That figure is largely unchanged from a roughly comparable two-month period through Jan. 16, 2015.

The Obama administration wasn’t able to ensure that all tax-credit payments made to insurers under the health law in 2014 were on behalf of consumers who had paid their premiums, according to a federal oversight agency. The Health and Human Services’ Office of Inspector General released the report Wednesday. The findings raise questions about the oversight of tax-credit payments that went to insurers on behalf of consumers who qualified for financial assistance.

This week, a bill – the Restoring Americans’ Healthcare Freedom Act – will go to President Barack Obama’s desk. This bill would repeal his signature domestic policy achievement, the Affordable Care Act or ObamaCare. Of course the president will veto this bill, and he and his supporters will say this is no more than Republican political theatre.

But they’re wrong; it’s not just a stunt. Rather, this bill achieves three important things: It shows that Republicans are dedicated to fighting a bad policy with demonstrably bad results. It confirms that Republicans are listening to the will of the people on this policy. And Republicans are reminding the public that they can be trusted to repeal ObamaCare with a new Republican president.

This Kaiser Family Foundation/New York Times survey provides an in-depth look at the experiences of Americans ages 18-64 who say they or someone in their household had problems paying medical bills in the past year. The survey explores the causes of medical bill problems and the impacts they have on individuals and their families, finances, and access to health care. To provide context, a shorter companion survey was conducted among those who do not report having medical bill problems.

UnitedHealth Group Inc., the largest U.S. health insurer, said its rates for ObamaCare plans in New York may be too low because the failure of a competing insurer last year might lead to shortfalls in payments designed to stabilize Obamacare markets.

In states like New York, health insurers participating in ObamaCare negotiate annually with regulators to set prices for coverage. UnitedHealth’s rates were set anticipating risk-sharing payments designed to stabilize the new insurance markets, William Golden, the company’s northeast region chief executive officer, said Wednesday. If the loss of a participant reduces the funds available to UnitedHealth, the company’s rates in New York’s ObamaCare market may be insufficient, he said.

Going into President Barack Obama’s last year in office, progress has stalled on reducing the number of uninsured Americans under his signature health care law, according to a major survey out Thursday.

The share of U.S. adults without health insurance was 11.9% in the last three months of 2015, essentially unchanged from the start of the year, according to the Gallup-Healthways Well-Being Index. The ongoing survey, based on daily interviews with 500 people, has been used by media, social scientists, and administration officials to track the law’s impact.