Science. It works. 

month
2012 2013
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2011 2012 2013
  • January 28
  • February 34
  • March 22
  • April 40
  • May 39
  • June 30
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2011 2012
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  • April 54
  • May 51
  • June 43
  • July 27
  • August 30
  • September 27
  • October 51
  • November 42
  • December 28