Jeff;
You could use proc format to create labels for the order values. To eliminate the "Order=", try label order='00'x;
Lastly, pie charts are a rather ineffective and inefficient way to present data and especially so when trying to make comparisons across "Orders". Consider the use of vbar or hbar charts by "order". Label the response axis or the title with a statement that indicates that each bar represents a proportion of the whole. The resultant display will be much more effective. For a "treatise" on circular charts and alternatives, see http://www.perceptualedge.com/articles/visual_business_intelligence/our_fascination_with_all_things_circular.pdf
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