Standard Deviation 

month
2012 2013
  • January 21
  • February 17
  • March 35
  • April 10
  • May 18
  • June
  • July
  • August
  • September
  • October
  • November
  • December
2011 2012 2013
  • January 1
  • February 2
  • March
  • April 6
  • May 2
  • June 25
  • July 83
  • August 13
  • September 23
  • October 68
  • November 6
  • December 6
2011 2012
  • January
  • February
  • March
  • April
  • May 10
  • June
  • July
  • August
  • September
  • October 2
  • November 1
  • December 3