(click on images to enlarge)
Today the "Cold Storage" data was released: http://www.usda.gov/nass/PUBS/TODAYRPT/cost0311.pdf
On page four one can read that the total American Cheese at the end of February 2011 when compared end of January 2011 is 98%.
But, when you look at the individual areas, it looks more like 90%. See graph above.
