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| Date | Max Price | Avg Price | # Prices |
|---|---|---|---|
| 2012-05-16 | $30.74 | $21.20 | 21 |
| 2012-05-15 | $30.74 | $19.10 | 11 |
| 2012-05-14 | $30.27 | $20.11 | 25 |
| 2012-05-13 | $30.00 | $20.26 | 11 |
| 2012-05-12 | $31.90 | $19.97 | 11 |
| 2012-05-11 | $31.90 | $20.58 | 21 |
| 2012-05-10 | $32.50 | $20.97 | 12 |
| 2012-05-08 | $32.40 | $19.94 | 11 |
| 2012-05-07 | $32.40 | $24.80 | 12 |
| 2012-05-06 | $32.40 | $21.03 | 27 |
| 2012-05-05 | $32.40 | $21.66 | 12 |
| 2012-05-04 | $30.71 | $22.13 | 20 |
| 2012-05-03 | $30.21 | $23.95 | 10 |
| 2012-05-01 | $29.51 | $23.62 | 11 |
| 2012-04-30 | $31.09 | $23.83 | 15 |
| 2012-04-29 | $31.13 | $21.91 | 10 |
| 2012-04-28 | $31.19 | $22.33 | 11 |
| 2012-04-27 | $31.21 | $22.49 | 11 |
| 2012-04-26 | $31.25 | $22.85 | 11 |
| 2012-04-25 | $31.30 | $23.74 | 11 |
| 2012-04-24 | $31.32 | $24.66 | 9 |
| 2012-04-23 | $29.00 | $22.37 | 11 |
| 2012-04-22 | $29.00 | $21.00 | 24 |
| 2012-04-21 | $29.00 | $25.78 | 23 |
| 2012-04-20 | $29.87 | $22.36 | 11 |
| 2012-04-19 | $32.39 | $23.34 | 15 |
| 2012-04-17 | $33.70 | $23.39 | 12 |
| 2012-04-16 | $35.05 | $23.20 | 12 |
| 2012-04-09 | $35.05 | $25.81 | 9 |
| 2012-04-08 | $35.05 | $24.10 | 14 |
| 2012-04-05 | $35.05 | $29.54 | 3 |
| 2012-04-04 | $35.05 | $26.92 | 12 |
| 2012-04-03 | $35.04 | $26.26 | 13 |
| 2012-04-02 | $32.40 | $25.67 | 14 |
| 2012-04-01 | $33.13 | $24.98 | 18 |
| 2012-03-28 | $29.68 | $24.04 | 17 |
| 2012-03-27 | $29.69 | $25.18 | 14 |
| 2012-03-26 | $30.94 | $24.52 | 45 |
| 2012-03-25 | $30.45 | $24.54 | 14 |
| 2012-03-24 | $29.68 | $23.21 | 13 |
| 2012-03-23 | $30.73 | $23.34 | 30 |
| 2012-03-22 | $29.02 | $22.75 | 14 |
| 2012-03-21 | $29.02 | $20.83 | 50 |
| 2012-03-20 | $28.80 | $21.13 | 51 |
| 2012-03-19 | $29.66 | $21.02 | 13 |
| 2012-03-18 | $29.66 | $21.92 | 13 |
| 2012-03-17 | $29.86 | $23.72 | 14 |
| 2012-03-16 | $31.09 | $22.62 | 13 |
| 2012-03-15 | $32.38 | $23.80 | 13 |
| 2012-03-14 | $33.70 | $23.74 | 14 |
| 2012-03-13 | $35.09 | $23.04 | 31 |
| 2012-03-12 | $35.04 | $26.20 | 14 |
| 2012-03-11 | $31.25 | $22.65 | 12 |
| 2012-03-10 | $31.21 | $24.24 | 14 |
| 2012-03-09 | $31.25 | $22.45 | 14 |
| 2012-03-08 | $31.25 | $24.83 | 22 |
| 2012-03-07 | $31.22 | $22.42 | 14 |
| 2012-03-06 | $32.38 | $21.63 | 30 |
| 2012-03-05 | $33.72 | $24.89 | 19 |
| 2012-03-04 | $35.08 | $23.55 | 14 |
| 2012-03-03 | $35.09 | $24.02 | 13 |
| 2012-03-01 | $35.09 | $23.75 | 47 |
| 2012-02-29 | $32.21 | $23.70 | 15 |
| 2012-02-26 | $32.16 | $24.02 | 14 |
| 2012-02-25 | $31.80 | $24.96 | 15 |
| 2012-02-24 | $31.80 | $23.43 | 27 |
| 2012-02-23 | $31.76 | $23.92 | 14 |
| 2012-02-22 | $31.80 | $24.19 | 28 |
| 2012-02-21 | $31.56 | $23.19 | 14 |
| 2012-02-20 | $32.85 | $23.33 | 31 |
| 2012-02-19 | $33.72 | $24.85 | 16 |
| 2012-02-18 | $35.07 | $25.22 | 16 |
| 2012-02-17 | $35.06 | $26.10 | 16 |
| 2012-02-16 | $35.07 | $25.67 | 15 |
| 2012-02-15 | $35.09 | $26.66 | 16 |
| 2012-02-14 | $35.06 | $29.26 | 29 |
| 2012-02-13 | $35.08 | $26.91 | 16 |
| 2012-02-09 | $35.08 | $28.10 | 63 |
| 2012-02-08 | $35.06 | $32.82 | 4 |
| 2012-02-07 | $35.04 | $26.93 | 16 |
| 2012-02-06 | $35.07 | $25.99 | 36 |
| 2012-02-05 | $35.07 | $26.15 | 76 |
| 2012-02-04 | $35.04 | $26.74 | 16 |
| 2012-02-01 | $34.50 | $30.14 | 5 |
| 2012-01-28 | $36.44 | $30.39 | 12 |
| 2012-01-26 | $39.90 | $27.95 | 21 |
| 2012-01-25 | $39.90 | $27.86 | 41 |
| 2012-01-24 | $39.90 | $27.32 | 43 |
| 2012-01-21 | $34.39 | $33.60 | 4 |
| 2012-01-20 | $39.90 | $33.11 | 5 |
| 2012-01-16 | $39.90 | $31.15 | 9 |
| 2012-01-13 | $33.50 | $29.56 | 4 |
| 2012-01-12 | $33.50 | $30.12 | 4 |
| 2012-01-11 | $34.09 | $31.53 | 5 |
| 2012-01-10 | $34.25 | $31.63 | 5 |
| 2012-01-09 | $35.75 | $31.83 | 4 |
| 2012-01-06 | $35.75 | $32.57 | 5 |
| 2012-01-05 | $35.75 | $31.46 | 5 |
| 2012-01-04 | $35.75 | $31.24 | 5 |
| 2012-01-03 | $35.75 | $31.79 | 9 |
| 2012-01-02 | $35.75 | $31.31 | 5 |
| 2011-12-31 | $35.50 | $30.87 | 8 |
| 2011-12-29 | $33.28 | $30.44 | 5 |
| 2011-12-28 | $33.28 | $30.52 | 5 |
| 2011-12-27 | $33.28 | $29.05 | 5 |
| 2011-12-23 | $31.20 | $23.89 | 4 |
| 2011-12-22 | $33.28 | $28.49 | 5 |
| 2011-12-21 | $33.28 | $25.19 | 20 |
| 2011-12-20 | $31.49 | $27.36 | 5 |
| 2011-12-19 | $31.49 | $25.64 | 8 |
| 2011-12-18 | $31.49 | $30.68 | 4 |
| 2011-12-17 | $31.25 | $30.61 | 4 |
| 2011-12-16 | $31.25 | $28.59 | 5 |
| 2011-12-15 | $31.25 | $28.84 | 5 |
| 2011-12-13 | $31.25 | $19.80 | 36 |
| 2011-12-10 | $31.25 | $30.68 | 4 |
| 2011-12-08 | $31.20 | $19.07 | 17 |
| 2011-12-02 | $32.75 | $19.96 | 18 |
| 2011-11-23 | $31.20 | $22.68 | 3 |
| 2011-11-19 | $31.20 | $22.52 | 3 |
| 2011-11-17 | $28.25 | $14.45 | 3 |
| 2011-11-16 | $28.75 | $18.02 | 4 |
| 2011-11-15 | $30.96 | $17.33 | 11 |
| 2011-11-14 | $28.25 | $17.38 | 2 |
| 2011-11-13 | $30.96 | $13.81 | 14 |
| 2011-11-08 | $21.17 | $14.56 | 3 |
| 2011-11-03 | $31.20 | $16.65 | 2 |
| 2011-10-29 | $31.20 | $18.59 | 2 |
| 2011-10-26 | $31.20 | $22.21 | 10 |
| 2011-10-25 | $31.20 | $22.25 | 10 |
| 2011-10-18 | $31.20 | $28.18 | 3 |
| 2011-10-16 | $31.20 | $21.74 | 8 |
| 2011-10-15 | $31.20 | $19.97 | 16 |
| 2011-10-13 | $31.20 | $19.98 | 84 |
| 2011-10-10 | $31.20 | $23.17 | 12 |
| 2011-10-08 | $31.20 | $22.91 | 8 |
| 2011-09-27 | $28.14 | $22.52 | 14 |
| 2011-09-23 | $27.50 | $18.72 | 58 |
| 2011-08-25 | $31.52 | $23.71 | 15 |
| 2011-07-07 | $29.75 | $21.86 | 14 |
| 2011-06-20 | $28.75 | $22.64 | 15 |
| 2011-06-19 | $28.75 | $22.94 | 14 |
| 2011-06-08 | $29.50 | $22.79 | 15 |
| 2011-03-15 | $4.50 | $4.50 | 1 |
| 2011-03-08 | $6.50 | $3.16 | 3 |