Google Inc. derives revenue from three major sources: advertising revenue from their websites, advertising revenue from the thousands of third-party websites that comprise the Google Network, and licensing and miscellaneous revenue. The following table shows the percentage of all revenue derived from these sources for the period from 2008 to 2012.

a) Are these row or column percentages?
b) Make an appropriate display of these data.
c) Write a brief summary of this information.

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2008 2009 2010 2011 69% 28% 3% 2012 68% 27% 5% Googie Websites Google Network Members,Websites Other Revenues 66% 31% 3% 67% 30% 3% 66% 30% 4%