(Federal Prison Overcrowding) "The number of inmates held in BOP [Bureau of Prisons] facilities grew from 125,560 in FY200051 to 180,725 as of September 2011. From FY2000–FY2010, prison crowding grew from 32% over rated capacity to 37% over rated capacity, despite the fact that the number of facilities operated by BOP increased from 97 to 116. The growing federal prison population has not only resulted in more crowded prisons, but it has also strained BOP’s ability to properly manage and care for federal inmates."

Source

Sacco, Lisa N. and Finklea, Kristin M., "Synthetic Drugs: Overview and Issues for Congress, Congressional Research Service (Washington, DC: Library of Congress, October 28, 2011), p. 12.
http://www.fas.org/sgp/crs/mi…