The taxpayer cost to protect U.S. Education Secretary Betsy DeVos continues to stretch into the millions. Politico reports that the price tag was $6.24 million for Fiscal Year 2019, according to the U.S. Marshals Service.

The cost of the security detail for DeVos, a West Michigan billionaire, was $6.79 million in Fiscal Year 2018. The service projects it will be $7.87 million for the next fiscal year, but didn’t indicate why it would be more, Politico reports. President Donald Trump tapped DeVos, a longtime advocate for and donor to education choice efforts, as an original member of his cabinet.

Politico notes that the marshals service routinely conducts assessments on threats to DeVos, but notes her security detail “is highly unusual — the past four Education secretaries have been protected by the Education Department’s own small security force.”