Public reporting burden for the collection of information is estimated to average 1 hour per response, including the time for reviewing instructions, searching existing data sources, gathering and maintaining the data needed, and completing and reviewing the collection of information. Send comments regarding this burden estimate or any other aspect of this collection of information, including suggestions for reducing this burden, to Washington Headquarters Services, Directorate for Information Operations and Reports, 1215 Jefferson Davis Highway, Suite 1204, Arlington VA 22202-4302. Respondents should be aware that notwithstanding any other provision of law, no person shall be subject to a penalty for failing to comply with a collection of information if it does not display a currently valid OMB control number. SOURCE: United Nations, World Urbanization Prospects: The 2007 Revision Popula- tion Database, New York: United Nations, Development, Economic and Social Affairs, Population Division, 2007. SOURCE: International Monetary Fund, /nternational Financial Statistics, various years. DARIN AATOIN 22 U.S. Assistance to Pakistan, FY 2002-2009 (rounded to the nearest millions of dollars) SOURCES: Kronstadt, 2008c; Grimmett, 2008. U.S. Military Arms Sales to Pakistan in 2007