Defense Department contractors in Afghanistan still outnumber U.S. troops by a 3-to-1 margin according to new research released this week, raising questions again about the role those workers play in the ongoing wars overseas and the oversight they receive.

The data, compiled by the Congressional Research Service and first reported by Politico, shows contractor numbers in both Iraq and Afghanistan dating back to fiscal 2007. Combined, the Defense Department spent more than $220 billion on contractors in both war zones for a variety of services and support.

The numbers show that the non-military defense workers have outnumbered U.S. troops in Afghanistan continuously since mid-2011, even as the numbers of both have drawn down steadily. But the ratio between the two groups continues to widen as administration officials work to reduce the roles played by armed military personnel in the war-torn country.

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