According to a government audit, USAspending.gov was missing $619 billion from 302 federal programs.
The government accountability office adds, the data that does exist is not accurate. The audit just looked at 2012 spending but found only two to seven percent of spending data matched agency records.
The Department of the Interior says it did not report spending for many of its programs because its accounting systems weren't compatible with the website.
The office of National Drug Control Policy says it thought the Health and Human Services would report its spending.
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