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## Key Products 

Net sales of key products represented 84% of total net sales in 2012, 86% in 2011 and 84% in 2010. The following table presents U.S. and international net sales by key product, the percentage change from the prior period and the foreign exchange impact when compared to the prior period. Commentary detailing the reasons for significant variances for key products is provided below: 

<img src='content_image/174176.jpg'>

** Change in excess of 100%. 

