| Date | Open | Close | Volume |
| 2010-03-02 | 19.75 | 20.65 | 2451100 |
| 2010-03-01 | 19.43 | 19.71 | 1380400 |
| 2010-02-26 | 19.43 | 19.30 | 750900 |
| 2010-02-25 | 19.01 | 19.36 | 544900 |
| 2010-02-24 | 18.92 | 19.39 | 480900 |
| 2010-02-23 | 18.80 | 18.87 | 760500 |
| 2010-02-22 | 18.71 | 18.90 | 381200 |
| 2010-02-19 | 18.64 | 18.66 | 699000 |
| 2010-02-18 | 18.60 | 18.65 | 390000 |
| 2010-02-17 | 18.76 | 18.68 | 376500 |
| 2010-02-16 | 18.40 | 18.68 | 276600 |
| 2010-02-12 | 17.88 | 18.25 | 522100 |
| 2010-02-11 | 17.70 | 18.13 | 494100 |
| 2010-02-10 | 17.60 | 17.80 | 695100 |
| 2010-02-09 | 17.67 | 17.66 | 550000 |
| 2010-02-08 | 17.41 | 17.57 | 734900 |
| 2010-02-05 | 17.10 | 17.26 | 495200 |
| 2010-02-04 | 18.02 | 17.10 | 787500 |
| 2010-02-03 | 18.59 | 18.14 | 641600 |
| 2010-02-02 | 18.59 | 18.56 | 630200 |
| 2010-02-01 | 17.89 | 18.62 | 846800 |
| 2010-01-29 | 17.80 | 17.79 | 1284900 |
| 2010-01-28 | 18.37 | 17.66 | 812200 |
| 2010-01-27 | 18.09 | 18.32 | 617500 |
| 2010-01-26 | 18.64 | 18.21 | 607700 |
| 2010-01-25 | 18.76 | 18.67 | 831600 |
| 2010-01-22 | 19.10 | 18.64 | 2049600 |
| 2010-01-21 | 18.42 | 19.10 | 2466900 |
| 2010-01-20 | 18.69 | 18.33 | 1106700 |
| 2010-01-19 | 18.34 | 18.86 | 1240000 |
| 2010-01-15 | 18.64 | 18.24 | 1661000 |
| 2010-01-14 | 17.94 | 18.63 | 2250800 |
Other Companies: 02-10-2008 | Vanguard Natural Resources, LLC | 05-04-2008
BlackRock Floating Rate Income Strategies Fund, Inc. | 07-08-2008 | American Water Works Company, Inc.