Symbol,Date,Open,High,Low,Close,Volume,Change,% Change
PWER,06/30/12,4.530,4.570,4.450,4.520,1032046,0.00,0.00%
PWER,06/29/12,4.530,4.570,4.450,4.520,1037245,0.10,2.26%
PWER,06/28/12,4.460,4.520,4.370,4.420,822346,-0.10,-2.21%
PWER,06/27/12,4.430,4.605,4.410,4.520,844631,0.09,2.03%
PWER,06/26/12,4.540,4.580,4.370,4.430,657206,-0.11,-2.42%
PWER,06/25/12,4.540,4.590,4.450,4.540,437526,-0.06,-1.30%
PWER,06/22/12,4.490,4.640,4.450,4.600,2690151,0.12,2.68%
PWER,06/21/12,4.570,4.590,4.440,4.480,1301640,-0.09,-1.97%
PWER,06/20/12,4.570,4.610,4.450,4.570,1014464,0.01,0.22%
PWER,06/19/12,4.470,4.630,4.435,4.560,1235521,0.07,1.56%
PWER,06/18/12,4.350,4.500,4.290,4.490,1026016,0.13,2.98%
PWER,06/15/12,4.270,4.380,4.220,4.360,1109490,0.08,1.87%
PWER,06/14/12,4.230,4.300,4.150,4.280,998759,0.06,1.42%
PWER,06/13/12,4.170,4.265,4.080,4.220,1227045,0.00,0.00%
PWER,06/12/12,4.060,4.250,4.025,4.220,1049905,0.19,4.71%
PWER,06/11/12,4.300,4.320,4.020,4.030,705552,-0.23,-5.40%
PWER,06/08/12,4.100,4.300,4.050,4.260,747606,0.15,3.65%
PWER,06/07/12,4.240,4.330,4.100,4.110,915224,-0.09,-2.14%
PWER,06/06/12,4.150,4.210,4.110,4.200,757694,0.09,2.19%
PWER,06/05/12,3.950,4.140,3.930,4.110,821180,0.15,3.79%
PWER,06/04/12,4.080,4.100,3.900,3.960,584978,-0.10,-2.46%
PWER,06/02/12,4.050,4.140,4.010,4.060,729110,0.00,0.00%
PWER,06/01/12,4.050,4.140,4.010,4.060,739852,-0.09,-2.17%
PWER,05/31/12,4.000,4.200,3.900,4.150,1592212,0.24,6.14%
PWER,05/30/12,4.010,4.040,3.890,3.910,831767,-0.13,-3.22%
PWER,05/29/12,3.850,4.160,3.850,4.040,1911648,0.21,5.48%
PWER,05/25/12,3.690,3.840,3.680,3.830,1068146,0.12,3.23%
PWER,05/24/12,3.740,3.750,3.600,3.710,728761,-0.01,-0.27%
PWER,05/23/12,3.600,3.730,3.560,3.720,756726,0.08,2.20%
PWER,05/22/12,3.660,3.700,3.560,3.640,977661,-0.01,-0.27%
PWER,05/21/12,3.580,3.695,3.560,3.650,844256,0.08,2.24%
PWER,05/18/12,3.860,3.871,3.510,3.570,2469280,-0.37,-9.39%
PWER,05/17/12,3.910,4.020,3.840,3.940,1569639,0.00,0.00%
PWER,05/16/12,3.980,4.050,3.890,3.940,1836696,-0.03,-0.76%
PWER,05/15/12,3.930,4.060,3.870,3.970,1868448,0.02,0.51%
PWER,05/14/12,3.990,3.990,3.870,3.950,1702574,-0.06,-1.50%
PWER,05/11/12,3.740,4.020,3.730,4.010,1974348,0.31,8.38%
PWER,05/10/12,3.760,3.760,3.620,3.700,953466,-0.03,-0.80%
PWER,05/09/12,3.610,3.745,3.560,3.730,1397055,0.05,1.36%
PWER,05/08/12,3.810,3.900,3.630,3.680,2252634,-0.13,-3.41%
PWER,05/07/12,3.900,3.920,3.800,3.810,1702513,-0.12,-3.05%
PWER,05/04/12,4.380,4.500,3.890,3.930,4475835,-0.50,-11.29%
PWER,05/03/12,4.430,4.450,4.280,4.430,2106267,-0.02,-0.45%
PWER,05/02/12,4.290,4.460,4.210,4.450,1609235,0.15,3.49%
PWER,05/01/12,4.310,4.480,4.260,4.300,1586792,0.04,0.82%
PWER,04/30/12,4.270,4.300,4.180,4.265,714513,0.00,0.12%
PWER,04/27/12,4.200,4.300,4.150,4.260,915972,0.09,2.28%
PWER,04/26/12,4.180,4.270,4.150,4.165,627512,-0.04,-0.83%
PWER,04/25/12,4.180,4.210,4.090,4.200,928203,0.10,2.44%
PWER,04/24/12,4.050,4.120,4.010,4.100,671689,0.06,1.49%
PWER,04/23/12,4.050,4.080,3.980,4.040,1320573,-0.05,-1.22%
PWER,04/20/12,4.270,4.270,4.070,4.090,995047,-0.11,-2.62%
PWER,04/19/12,4.190,4.350,4.150,4.200,1310268,-0.11,-2.55%
PWER,04/18/12,4.440,4.440,4.280,4.310,835228,-0.17,-3.79%
PWER,04/17/12,4.600,4.680,4.470,4.480,1478565,-0.08,-1.75%
PWER,04/16/12,4.470,4.600,4.330,4.560,2396501,0.11,2.47%
PWER,04/13/12,4.260,4.480,4.200,4.450,2772173,0.16,3.73%
PWER,04/12/12,4.180,4.300,4.140,4.290,1753990,0.11,2.51%
PWER,04/11/12,4.110,4.190,4.079,4.185,1599237,0.12,3.08%
PWER,04/10/12,4.140,4.170,4.030,4.060,895580,-0.08,-1.93%
PWER,04/09/12,4.100,4.190,4.060,4.140,1006378,-0.05,-1.19%
PWER,04/05/12,4.160,4.205,4.120,4.190,939948,0.02,0.48%
PWER,04/04/12,4.270,4.290,4.120,4.170,1279947,-0.14,-3.25%
PWER,04/03/12,4.440,4.520,4.300,4.310,1588296,-0.17,-3.79%