Health insurance subsidies are expected to cost the federal government about $660 billion in 2016, according to the Congressional Budget Office.

Much of the $136 billion in extra health spending stems from “significantly higher” enrollment in Medicaid, the federal health program for low-income people, according to the CBO’s latest annual report on healthcare spending. The estimates do not include spending on people over the age of 65.

The CBO figures also show an 11 percent increase in the cost of ObamaCare subsidies.

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