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SAN FRANCISCO - JULY 5 : Containers of milk are stocked at the Fog Hill Market on July 5, 2007 in San Francisco, California. The California Department of Food and Agriculture has increased what dairy farmers receive for a gallon of milk to $1.98, up from $1.06 last year. The price increase comes as a result of a various shifts in supply and demand and rising costs of fuel. (Photo by David Paul Morris/Getty Images)

SAN FRANCISCO - JULY 5 : Containers of milk are stocked at the Fog Hill Market on July 5, 2007 in San Francisco, California.  The California Department of Food and Agriculture has increased what dairy farmers receive for a gallon of milk to $1.98, up from $1.06 last year. The price increase comes as a result of a various shifts in supply and demand and rising costs of fuel. (Photo by David Paul Morris/Getty Images)