Symbol,Date,Open,High,Low,Close,Volume,Change,% Change
ECH,05/31/12,58.96,59.68,57.83,59.55,387442,0.72,1.22%
ECH,05/30/12,58.24,58.89,58.20,58.83,111562,-0.76,-1.28%
ECH,05/29/12,59.53,60.00,59.22,59.59,228124,0.30,0.51%
ECH,05/25/12,58.72,59.33,58.67,59.29,116466,0.28,0.47%
ECH,05/24/12,59.03,59.54,58.57,59.01,345862,0.13,0.22%
ECH,05/23/12,58.67,58.94,57.58,58.88,457638,-0.32,-0.54%
ECH,05/22/12,60.35,60.45,58.70,59.20,1031199,-0.91,-1.51%
ECH,05/21/12,59.49,60.30,59.29,60.11,186424,0.76,1.28%
ECH,05/18/12,60.41,60.44,59.18,59.35,187620,-0.62,-1.03%
ECH,05/17/12,60.73,60.73,59.77,59.97,151584,-0.92,-1.51%
ECH,05/16/12,61.55,62.32,60.80,60.89,333536,-1.08,-1.74%
ECH,05/15/12,63.55,63.55,61.77,61.97,265970,-1.46,-2.30%
ECH,05/14/12,64.17,64.50,63.41,63.43,284813,-1.96,-3.00%
ECH,05/11/12,64.53,65.79,64.02,65.39,301110,-0.02,-0.03%
ECH,05/10/12,65.73,65.73,65.18,65.41,164509,0.20,0.31%
ECH,05/09/12,64.90,65.63,64.54,65.21,175397,-1.06,-1.60%
ECH,05/08/12,66.97,66.97,65.77,66.27,172500,-0.58,-0.87%
ECH,05/07/12,66.46,66.95,65.44,66.85,364135,0.23,0.35%
ECH,05/04/12,66.35,67.00,66.03,66.62,264242,-0.07,-0.10%
ECH,05/03/12,67.29,67.53,66.56,66.69,185758,-0.31,-0.46%
ECH,05/02/12,67.35,67.54,66.61,67.00,191025,-0.81,-1.19%
ECH,05/01/12,67.34,68.55,67.20,67.81,96629,0.46,0.68%
ECH,04/30/12,67.20,67.60,66.89,67.35,214590,-0.16,-0.24%
ECH,04/27/12,67.60,67.65,67.15,67.51,136045,0.50,0.75%
ECH,04/26/12,66.61,67.26,66.41,67.01,184678,0.13,0.19%
ECH,04/25/12,66.92,67.20,66.80,66.88,144565,0.28,0.42%
ECH,04/24/12,66.46,66.90,66.46,66.60,152753,0.04,0.06%
ECH,04/23/12,66.09,66.56,65.72,66.56,103327,-0.51,-0.76%
ECH,04/20/12,66.79,67.36,66.55,67.07,223286,0.58,0.87%
ECH,04/19/12,65.89,66.56,65.86,66.49,127619,0.63,0.96%
ECH,04/18/12,66.07,66.21,65.57,65.86,138265,-0.87,-1.30%
ECH,04/17/12,66.66,66.90,66.43,66.73,110541,0.88,1.34%
ECH,04/16/12,66.43,66.99,65.52,65.85,161563,-0.41,-0.62%
ECH,04/13/12,67.11,67.11,66.26,66.26,105427,-1.04,-1.55%
ECH,04/12/12,67.01,67.52,66.98,67.30,119284,0.83,1.25%
ECH,04/11/12,67.38,67.51,66.47,66.47,113405,-0.12,-0.18%
ECH,04/10/12,67.76,67.80,66.52,66.59,169497,-1.15,-1.70%
ECH,04/09/12,67.82,68.27,67.74,67.74,146515,-1.01,-1.47%
ECH,04/05/12,67.95,68.97,67.95,68.75,236917,0.17,0.25%
ECH,04/04/12,68.58,68.59,68.04,68.58,177699,-0.61,-0.88%
ECH,04/03/12,69.41,69.58,68.97,69.19,115488,-0.32,-0.46%
ECH,04/02/12,68.24,69.60,68.10,69.51,273316,1.21,1.77%
ECH,03/30/12,68.69,68.96,68.16,68.30,128008,0.32,0.47%
ECH,03/29/12,67.75,68.04,67.53,67.98,117693,-0.29,-0.42%
ECH,03/28/12,68.46,68.63,68.08,68.27,44594,-0.67,-0.97%
ECH,03/27/12,68.69,69.09,68.69,68.94,96567,0.00,0.00%
ECH,03/26/12,68.09,68.94,68.06,68.94,121737,1.56,2.32%
ECH,03/23/12,67.05,67.48,66.89,67.38,83878,0.17,0.25%
ECH,03/22/12,67.44,67.66,67.01,67.21,81843,-0.92,-1.34%
ECH,03/21/12,68.41,68.50,67.97,68.12,47752,-0.06,-0.08%
ECH,03/20/12,67.99,68.48,67.57,68.18,83437,-0.53,-0.77%
ECH,03/19/12,68.00,68.83,67.90,68.71,63097,0.79,1.16%
ECH,03/16/12,68.09,68.46,67.92,67.92,63351,0.11,0.16%
ECH,03/15/12,67.28,67.88,67.09,67.81,115129,0.88,1.31%
ECH,03/14/12,67.20,67.42,66.74,66.93,96928,-0.90,-1.33%
ECH,03/13/12,66.83,67.83,66.48,67.83,541922,1.10,1.65%
ECH,03/12/12,66.62,66.73,66.42,66.73,91307,0.09,0.14%
ECH,03/09/12,66.80,67.11,66.59,66.64,52815,-0.02,-0.03%
ECH,03/08/12,66.20,66.72,66.20,66.66,79595,1.35,2.07%
ECH,03/07/12,65.40,65.74,65.29,65.31,353357,0.04,0.07%
ECH,03/06/12,65.78,65.78,65.12,65.26,768584,-1.50,-2.25%
ECH,03/05/12,67.56,67.63,66.72,66.77,174071,-1.02,-1.50%
ECH,03/02/12,67.97,68.20,67.57,67.79,60836,-0.59,-0.86%