The size of the market presented here is based on values at the wholesale level, farm receipts for the sale of corn.

Geographic reference: United States
Year: 2009
Market size: $42.0 billion
Source: “U.S. Farm Sector Cash Receipts from Sales of Agricultural Commodities, 2006-2010F,” a table on the USDA’s Economic Research Service website, available online here.
Original source: Economic Research Service, United States Department of Agriculture