The health department didn’t say what the plans would cost in dollar terms. Almost 80 percent of individuals who have previously bought coverage on the PPACA website will be able to find a plan for less than $100 a month after subsidies, it said.

The Obama administration has been seeking to make sure affordable options are available as part of its goal of getting more people signed up for insurance in the 2016 enrollment period, which starts Sunday.

Those who remain uninsured tend to be younger and poorer than people who’ve already signed up, HHS Secretary Sylvia Mathews Burwell has said. Some insurers had sought rate increases of 10 percent or more for 2016, raising concerns that cheap options would dwindle.

The premium data released Monday is just one portion of what individuals need to consider as they shop for coverage, according to Robert Laszewski, an insurance industry consultant.

People need to be mindful of what doctors and hospitals are covered, and how much in out-of-pocket costs they may be on the hook for if they get sick, he said.

“The bottom line here is consumers have to shop carefully,” he said. “You can’t just buy price.”

Last week, government officials introduced new features for HealthCare.gov to help people compare the costs of plans.

The analysis released Monday includes states that are relying on the HealthCare.gov website for both 2015 and 2016. Hawaii, which switched to the federal site this year, isn’t included.

Changes in the second-lowest cost silver plans varied widely among states and cities. Premiums climbed 35.7 percent in Oklahoma, and declined 12.6 percent in Indiana, for instance. The silver plans typically cover about 70 percent of an individual’s health-care costs, though more than half of people with PPACA plans get additional help that makes their coverage more generous.

Another measure shows that premiums may rise more when measured by the plans people actually choose. Weighted by enrollment, rates will increase by about 12 percent to 13 percent nationally, on average, according to Charles Gaba, who tracks the health law on ACASignups.net.

The figure assumes individuals sign up for the same plans that they currently have, and could be lower or higher if people switch plans.

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