[["2012:", "high", "low"], ["january 1 2012 to march 31 2012", "$ 37.79", "$ 29.26"], ["april 1 2012 to june 30 2012", "$ 37.65", "$ 26.22"], ["july 1 2012 to september 30 2012", "$ 34.00", "$ 26.88"], ["october 1 2012 to december 31 2012", "$ 35.30", "$ 29.00"], ["2011:", "high", "low"], ["january 1 2011 to march 31 2011", "$ 24.19", "$ 19.78"], ["april 1 2011 to june 30 2011", "$ 25.22", "$ 21.00"], ["july 1 2011 to september 30 2011", "$ 30.75", "$ 23.41"], ["october 1 2011 to december 31 2011", "$ 31