H-2B Nonagricultural Temporary Workers Visa and Status: Fiscal Year 2010 Semiannual Report to Congress, Part 2: April 1, 2009 - March 31, 2010 [open pdf - 2MB]
"The Department of Homeland Security (DHS) has compiled this report on H-2B nonagricultural temporary workers from information provided by the Department of State (DOS), the Department of Labor (DOL), and three Components within DHS. U.S. Citizenship and Immigration Services (USCIS), U.S. Customs and Border Protection (CBP), and U.S. Immigration and Customs Enforcement (ICE). This report includes data for the Fiscal Year (FY) 2010. The data contained in this report is accurate as of May 2011."
U.S. Citizenship and Immigration Services: http://www.uscis.gov/