U.S. inventory of all hogs and pigs on June 1, 2009 was 66.1 million head. This was down 2 percent from June 1, 2008 but up 1 percent from March 1, 2009. The breeding inventory, at 5.97 million head, was down 3 percent from last year and down slightly from the previous quarter. Market hog inventory, at 60.1 million head, was down 2 percent from last year but up 1 percent from last quarter. The pig crop, at 28.5 million head, was down slightly from 2008 but up 2 percent from 2007. Sows farrowed during this period totaled 2.97 million head, down 3 percent from last year.
http://www.usagnet.com/story-national.php?Id=2234&yr=2009