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| Date | Max Price | Avg Price | # Prices |
|---|---|---|---|
| 2012-02-02 | $32.50 | $21.90 | 38 |
| 2012-02-01 | $32.50 | $21.29 | 24 |
| 2012-01-28 | $33.75 | $19.60 | 30 |
| 2012-01-26 | $33.75 | $19.01 | 86 |
| 2012-01-21 | $33.00 | $20.46 | 54 |
| 2012-01-20 | $33.80 | $21.99 | 65 |
| 2012-01-19 | $31.25 | $21.78 | 17 |
| 2012-01-17 | $33.75 | $22.33 | 51 |
| 2012-01-16 | $33.75 | $24.98 | 34 |
| 2012-01-15 | $33.75 | $22.41 | 16 |
| 2012-01-14 | $33.75 | $22.64 | 16 |
| 2012-01-13 | $33.75 | $28.44 | 4 |
| 2012-01-12 | $33.75 | $22.95 | 34 |
| 2012-01-11 | $28.00 | $24.84 | 5 |
| 2012-01-10 | $28.00 | $24.65 | 5 |
| 2012-01-09 | $28.00 | $24.65 | 5 |
| 2012-01-06 | $28.00 | $24.47 | 8 |
| 2012-01-05 | $27.75 | $20.60 | 18 |
| 2012-01-04 | $26.80 | $19.35 | 37 |
| 2012-01-03 | $24.75 | $19.84 | 5 |
| 2012-01-02 | $25.00 | $18.45 | 38 |
| 2012-01-01 | $25.00 | $17.75 | 15 |
| 2011-12-31 | $24.75 | $17.58 | 24 |
| 2011-12-30 | $23.67 | $16.50 | 32 |
| 2011-12-29 | $20.57 | $15.86 | 4 |
| 2011-12-28 | $20.57 | $15.86 | 8 |
| 2011-12-27 | $23.35 | $15.53 | 24 |
| 2011-12-26 | $23.35 | $14.74 | 17 |
| 2011-12-25 | $23.35 | $13.64 | 68 |
| 2011-12-23 | $20.57 | $20.57 | 1 |
| 2011-12-22 | $23.35 | $14.06 | 35 |
| 2011-12-21 | $21.04 | $16.71 | 5 |
| 2011-12-20 | $22.50 | $18.00 | 5 |
| 2011-12-19 | $23.57 | $15.24 | 22 |
| 2011-12-18 | $23.57 | $16.18 | 25 |
| 2011-12-17 | $23.57 | $14.71 | 46 |
| 2011-12-16 | $24.00 | $16.95 | 26 |
| 2011-12-15 | $23.50 | $14.75 | 17 |
| 2011-12-14 | $23.75 | $14.54 | 59 |
| 2011-12-13 | $24.00 | $23.08 | 4 |
| 2011-12-12 | $24.00 | $14.04 | 16 |
| 2011-12-11 | $24.00 | $14.12 | 33 |
| 2011-12-10 | $24.00 | $14.34 | 16 |
| 2011-12-09 | $24.00 | $14.00 | 17 |
| 2011-12-08 | $24.25 | $14.72 | 15 |
| 2011-12-07 | $24.25 | $14.48 | 32 |
| 2011-12-02 | $26.25 | $25.50 | 4 |
| 2011-11-25 | $25.00 | $15.25 | 17 |
| 2011-11-24 | $25.00 | $13.68 | 15 |
| 2011-11-23 | $25.00 | $16.16 | 17 |
| 2011-11-22 | $25.00 | $15.48 | 14 |
| 2011-11-19 | $25.00 | $16.74 | 19 |
| 2011-11-18 | $25.00 | $15.05 | 29 |
| 2011-11-17 | $21.50 | $20.62 | 4 |
| 2011-11-16 | $23.75 | $19.96 | 6 |
| 2011-11-15 | $25.00 | $17.54 | 31 |
| 2011-11-14 | $19.00 | $17.50 | 2 |
| 2011-11-08 | $25.74 | $13.48 | 16 |
| 2011-11-03 | $25.00 | $13.24 | 30 |
| 2011-11-02 | $25.00 | $14.69 | 12 |
| 2011-10-30 | $32.46 | $15.40 | 15 |
| 2011-10-29 | $18.20 | $15.26 | 3 |
| 2011-10-27 | $21.03 | $19.61 | 4 |
| 2011-10-26 | $21.03 | $19.61 | 10 |
| 2011-10-25 | $26.95 | $12.46 | 9 |
| 2011-10-24 | $33.39 | $15.14 | 13 |
| 2011-10-18 | $23.07 | $21.45 | 3 |
| 2011-10-16 | $23.09 | $16.55 | 16 |
| 2011-10-13 | $21.40 | $16.18 | 8 |
| 2011-10-10 | $34.32 | $14.84 | 12 |
| 2011-10-08 | $35.48 | $19.48 | 10 |
| 2011-10-07 | $24.64 | $15.45 | 14 |
| 2011-09-26 | $24.61 | $12.60 | 15 |
| 2011-09-20 | $24.51 | $12.42 | 10 |
| 2011-09-19 | $24.51 | $13.72 | 7 |
| 2011-09-16 | $35.89 | $17.09 | 26 |
| 2011-08-25 | $29.67 | $17.53 | 15 |
| 2011-08-23 | $36.39 | $20.73 | 16 |
| 2011-08-17 | $35.39 | $22.67 | 28 |
| 2011-08-15 | $30.29 | $23.95 | 68 |
| 2011-08-14 | $36.39 | $24.48 | 33 |
| 2011-08-07 | $38.35 | $25.98 | 16 |
| 2011-08-01 | $38.35 | $23.93 | 58 |
| 2011-07-30 | $38.35 | $24.44 | 34 |
| 2011-07-29 | $38.35 | $24.20 | 32 |
| 2011-07-28 | $38.35 | $24.24 | 46 |
| 2011-07-27 | $38.35 | $25.05 | 14 |
| 2011-07-20 | $38.35 | $24.36 | 17 |
| 2011-07-19 | $38.35 | $25.28 | 16 |
| 2011-07-15 | $30.50 | $23.24 | 48 |
| 2011-07-10 | $38.35 | $23.80 | 71 |
| 2011-06-23 | $38.35 | $25.15 | 19 |
| 2011-06-12 | $38.35 | $25.47 | 19 |
| 2011-06-09 | $38.35 | $23.80 | 52 |
| 2011-06-08 | $38.35 | $24.67 | 50 |
| 2011-06-07 | $38.35 | $25.28 | 33 |
| 2011-06-06 | $38.35 | $25.61 | 34 |
| 2011-06-03 | $38.35 | $23.93 | 35 |
| 2011-06-02 | $38.35 | $24.43 | 32 |
| 2011-06-01 | $38.35 | $24.32 | 16 |
| 2011-05-25 | $39.00 | $23.76 | 31 |
| 2011-05-24 | $38.35 | $25.17 | 30 |
| 2011-05-23 | $39.79 | $23.63 | 32 |
| 2011-05-20 | $39.79 | $24.39 | 16 |
| 2011-05-19 | $39.79 | $24.99 | 16 |
| 2011-05-04 | $39.79 | $26.72 | 33 |
| 2011-05-03 | $39.79 | $26.47 | 27 |
| 2011-05-02 | $39.79 | $26.10 | 13 |
| 2011-04-27 | $39.79 | $26.17 | 15 |
| 2011-04-18 | $39.79 | $22.86 | 17 |
| 2011-04-17 | $32.50 | $23.56 | 14 |
| 2011-04-13 | $32.50 | $23.12 | 17 |
| 2011-04-01 | $32.50 | $22.04 | 17 |
| 2011-03-18 | $39.59 | $25.35 | 16 |
| 2011-03-15 | $39.59 | $24.47 | 17 |
| 2011-03-10 | $39.59 | $24.96 | 17 |
| 2011-03-06 | $39.59 | $26.75 | 18 |
| 2011-03-05 | $39.59 | $26.01 | 18 |
| 2011-03-04 | $39.59 | $26.12 | 18 |
| 2011-03-03 | $39.59 | $26.49 | 34 |
| 2011-03-02 | $39.59 | $25.98 | 18 |
| 2011-02-26 | $39.59 | $25.31 | 17 |
| 2011-02-09 | $40.78 | $26.71 | 75 |
| 2011-02-07 | $40.85 | $28.14 | 72 |
| 2011-01-25 | $28.60 | $28.60 | 1 |
| 2011-01-24 | $38.76 | $28.06 | 36 |
| 2011-01-20 | $40.98 | $29.37 | 15 |
| 2011-01-11 | $38.76 | $28.22 | 64 |
| 2011-01-10 | $38.76 | $29.19 | 14 |
| 2011-01-06 | $38.76 | $30.92 | 13 |
| 2010-12-28 | $39.59 | $27.45 | 56 |
| 2010-12-23 | $38.76 | $28.92 | 32 |
| 2010-12-20 | $38.76 | $27.75 | 16 |
| 2010-12-18 | $38.76 | $27.25 | 17 |
| 2010-12-17 | $38.76 | $27.53 | 83 |
| 2010-12-16 | $38.76 | $27.74 | 34 |
| 2010-12-15 | $38.76 | $27.33 | 16 |
| 2010-12-14 | $38.76 | $26.74 | 34 |
| 2010-12-10 | $38.76 | $27.17 | 16 |
| 2010-12-08 | $39.59 | $26.64 | 64 |
| 2010-12-07 | $40.59 | $27.65 | 16 |
| 2010-11-27 | $41.90 | $28.48 | 29 |
| 2010-11-25 | $41.90 | $25.92 | 49 |
| 2010-11-23 | $41.90 | $27.50 | 15 |
| 2010-11-03 | $38.76 | $25.18 | 14 |
| 2010-11-02 | $38.76 | $25.13 | 49 |
| 2010-10-30 | $38.76 | $25.83 | 14 |
| 2010-10-06 | $38.76 | $25.19 | 49 |
| 2010-10-02 | $38.76 | $27.81 | 26 |
| 2010-09-29 | $38.76 | $27.93 | 13 |
| 2010-09-26 | $38.76 | $27.50 | 73 |
| 2010-09-25 | $38.76 | $28.62 | 13 |
| 2010-09-22 | $38.76 | $27.43 | 56 |
| 2010-09-20 | $38.76 | $28.37 | 47 |
| 2010-09-17 | $38.76 | $28.40 | 48 |
| 2010-09-16 | $38.76 | $28.32 | 51 |
| 2010-09-13 | $38.76 | $29.63 | 15 |
| 2010-09-12 | $38.76 | $28.25 | 51 |
| 2010-09-11 | $38.76 | $28.20 | 49 |
| 2010-09-10 | $38.76 | $27.71 | 66 |
| 2010-09-09 | $38.76 | $27.53 | 51 |
| 2010-09-08 | $38.76 | $28.28 | 64 |
| 2010-09-05 | $38.76 | $28.17 | 49 |
| 2010-09-04 | $38.76 | $28.79 | 16 |
| 2010-09-02 | $38.76 | $27.09 | 36 |
| 2010-08-26 | $38.76 | $29.30 | 16 |
| 2010-08-02 | $36.63 | $27.55 | 28 |
| 2010-08-01 | $42.21 | $27.57 | 14 |
| 2010-07-24 | $42.21 | $26.06 | 34 |
| 2010-07-05 | $42.21 | $25.59 | 35 |
| 2010-06-22 | $40.47 | $27.34 | 36 |
| 2010-06-14 | $40.47 | $28.96 | 17 |
| 2010-06-01 | $38.51 | $27.25 | 18 |
| 2010-05-26 | $38.51 | $26.04 | 18 |
| 2010-05-24 | $38.51 | $25.96 | 18 |
| 2010-05-21 | $38.01 | $25.88 | 18 |
| 2010-05-14 | $37.75 | $25.93 | 17 |
| 2010-05-01 | $36.25 | $24.19 | 49 |
| 2010-04-29 | $36.25 | $25.81 | 72 |
| 2010-04-28 | $36.25 | $26.21 | 39 |
| 2010-04-23 | $36.25 | $24.90 | 218 |
| 2010-03-25 | $36.95 | $25.81 | 192 |
| 2010-03-21 | $36.95 | $25.82 | 29 |
| 2010-03-15 | $52.61 | $26.28 | 55 |
| 2010-03-13 | $52.61 | $26.38 | 27 |
| 2010-01-24 | $35.45 | $27.36 | 24 |
| 2010-01-19 | $35.45 | $25.86 | 24 |
| 2010-01-13 | $35.20 | $28.05 | 26 |
| 2010-01-12 | $35.20 | $28.69 | 51 |
| 2010-01-08 | $35.08 | $27.68 | 29 |
| 2010-01-07 | $35.21 | $27.63 | 28 |
| 2009-10-16 | $36.39 | $25.06 | 85 |
| 2009-06-16 | $34.75 | $27.53 | 15 |