According to the 2009 report, Show us the Data, the reports from the Congressional Research Service (CRS) are the most wanted U.S. federal documents. The survey results described the CRS Reports:
"The Congressional Research Service (CRS) uses taxpayer dollars to produce excellent reports on public policy issues ranging from foreign affairs to agriculture to health care. These reports are posted online, but on an internal system available only to Congressional offices through a password. Citizens can ask for these reports through their member of Congress, but they must know that the report exists. Currently, reports are sold by third parties or made available, when possible, by advocacy groups and others. Congress should make CRS release these reports to the public proactively and directly."