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| Date | Max Price | Avg Price | # Prices |
|---|---|---|---|
| 2010-09-02 | $3.18 | $3.18 | 1 |
| 2010-09-01 | $16.51 | $9.57 | 25 |
| 2010-08-30 | $17.75 | $11.63 | 12 |
| 2010-08-29 | $18.89 | $11.76 | 13 |
| 2010-08-21 | $20.80 | $10.06 | 25 |
| 2010-08-19 | $17.31 | $12.09 | 13 |
| 2010-08-18 | $18.35 | $12.63 | 51 |
| 2010-08-15 | $19.20 | $10.12 | 41 |
| 2010-08-12 | $17.81 | $11.57 | 12 |
| 2010-08-11 | $18.35 | $11.72 | 12 |
| 2010-08-06 | $16.83 | $11.31 | 12 |
| 2010-08-04 | $16.83 | $10.84 | 12 |
| 2010-08-03 | $18.93 | $9.80 | 36 |
| 2010-08-02 | $15.30 | $9.52 | 20 |
| 2010-07-30 | $15.19 | $5.64 | 11 |
| 2010-07-29 | $15.19 | $6.78 | 57 |
| 2010-07-27 | $15.19 | $9.14 | 11 |
| 2010-07-21 | $15.19 | $8.17 | 68 |
| 2010-07-20 | $15.19 | $8.15 | 22 |
| 2010-07-06 | $15.19 | $7.25 | 11 |
| 2010-07-05 | $15.19 | $7.29 | 22 |
| 2010-07-04 | $15.19 | $7.48 | 29 |
| 2010-07-01 | $15.19 | $8.75 | 11 |
| 2010-06-23 | $16.50 | $9.61 | 36 |
| 2010-06-22 | $16.50 | $9.85 | 38 |
| 2010-06-21 | $16.50 | $9.98 | 12 |
| 2010-06-15 | $15.19 | $9.24 | 12 |
| 2010-06-14 | $15.19 | $7.65 | 12 |
| 2010-06-10 | $15.19 | $8.33 | 24 |
| 2010-06-07 | $15.40 | $8.92 | 12 |
| 2010-06-06 | $15.40 | $9.28 | 12 |
| 2010-06-04 | $15.40 | $8.83 | 12 |
| 2010-06-03 | $15.40 | $8.88 | 12 |
| 2010-06-02 | $15.40 | $8.46 | 36 |
| 2010-05-26 | $19.25 | $12.90 | 10 |
| 2010-05-25 | $20.50 | $12.00 | 35 |
| 2010-05-24 | $18.98 | $10.36 | 12 |
| 2010-05-22 | $18.98 | $11.22 | 12 |
| 2010-05-21 | $20.67 | $12.95 | 24 |
| 2010-05-18 | $18.98 | $12.05 | 24 |
| 2010-05-12 | $16.20 | $9.19 | 11 |
| 2010-05-06 | $6.75 | $4.73 | 19 |
| 2010-04-29 | $6.60 | $4.30 | 8 |
| 2010-04-18 | $7.00 | $4.29 | 13 |
| 2010-04-13 | $7.04 | $4.87 | 13 |
| 2010-03-31 | $7.74 | $5.51 | 11 |
| 2010-03-21 | $5.13 | $3.34 | 24 |
| 2010-03-12 | $5.89 | $3.97 | 12 |
| 2010-03-09 | $4.95 | $3.19 | 12 |
| 2010-03-07 | $5.52 | $3.71 | 13 |
| 2010-02-20 | $7.33 | $4.82 | 13 |
| 2010-02-10 | $15.00 | $6.18 | 15 |
| 2010-02-01 | $13.71 | $9.42 | 16 |
| 2010-01-28 | $16.49 | $10.18 | 16 |
| 2010-01-23 | $20.38 | $13.10 | 15 |
| 2010-01-12 | $27.48 | $16.92 | 30 |
| 2009-12-27 | $15.81 | $10.18 | 67 |
| 2009-12-20 | $15.27 | $10.61 | 17 |
| 2009-12-18 | $16.58 | $9.93 | 51 |
| 2009-12-15 | $15.00 | $8.97 | 17 |
| 2009-12-09 | $15.62 | $10.01 | 18 |
| 2009-12-05 | $16.00 | $9.33 | 18 |
| 2009-11-18 | $21.00 | $12.01 | 18 |
| 2009-10-02 | $34.20 | $18.08 | 18 |
| 2009-09-23 | $32.47 | $17.56 | 19 |
| 2009-09-10 | $34.78 | $18.62 | 20 |
| 2009-08-13 | $35.50 | $21.91 | 20 |
| 2009-08-12 | $35.00 | $21.28 | 20 |
| 2009-08-04 | $34.75 | $26.45 | 18 |
| 2009-07-31 | $34.00 | $23.14 | 35 |
| 2009-07-17 | $38.69 | $23.28 | 62 |
| 2009-07-06 | $41.10 | $29.19 | 26 |
| 2009-06-28 | $41.10 | $28.84 | 24 |
| 2009-05-22 | $52.00 | $33.09 | 50 |
| 2009-04-27 | $48.25 | $33.11 | 29 |
| 2009-03-22 | $50.50 | $33.72 | 27 |
| 2009-03-19 | $50.50 | $35.07 | 28 |
| 2009-01-30 | $50.50 | $35.55 | 25 |
| 2009-01-29 | $50.50 | $36.01 | 25 |
| 2008-12-09 | $50.40 | $34.64 | 23 |
| 2008-06-19 | $46.00 | $32.59 | 24 |
| 2008-03-04 | $42.58 | $32.44 | 18 |
| 2008-01-10 | $44.40 | $35.37 | 15 |