Oklahoma expects to see almost a 36 percent increase next year for Obamacare health plans.

Rates on benchmark insurance plans offered on healthcare.gov in Oklahoma next year are predicted to go up 35.7 percent, which is the largest jump nationwide, according to a report released this week by the federal Health and Human Services Department.

The second to the lowest silver plans — or the benchmark plans on which federal subsidies are based — will cost an average 7.5 percent more nationwide, government analysts forecast.

Next to Oklahoma, Alaska has the highest predicted rate increase of 31.5 percent. Regionally, premiums are expected to rise in Arkansas 4.3 percent; Texas, 5.1 percent; Missouri, 10.4 percent; and Kansas, 16.1 percent.

Insurance costs are forecast to go down in four states: Indiana, down 12.6 percent; Mississippi, down 8.2 percent; Maine, down 1.2 percent; and Ohio, down 0.7 percent.