| Date | Open | Close | Volume |
| 2010-03-03 | 19.08 | 19.12 | 205100 |
| 2010-03-02 | 19.01 | 19.02 | 266200 |
| 2010-03-01 | 18.74 | 18.98 | 271900 |
| 2010-02-26 | 18.73 | 18.71 | 167100 |
| 2010-02-25 | 18.47 | 18.66 | 323700 |
| 2010-02-24 | 18.70 | 18.65 | 560700 |
| 2010-02-23 | 18.83 | 18.65 | 809900 |
| 2010-02-22 | 18.88 | 18.86 | 511000 |
| 2010-02-19 | 18.80 | 18.89 | 364300 |
| 2010-02-18 | 18.62 | 18.84 | 636000 |
| 2010-02-17 | 18.46 | 18.64 | 752600 |
| 2010-02-16 | 18.49 | 18.43 | 323500 |
| 2010-02-12 | 18.18 | 18.22 | 376600 |
| 2010-02-11 | 18.06 | 18.24 | 337800 |
| 2010-02-10 | 18.24 | 18.10 | 375600 |
| 2010-02-09 | 18.36 | 18.17 | 849500 |
| 2010-02-08 | 18.02 | 17.95 | 1624500 |
| 2010-02-05 | 17.94 | 17.98 | 1481000 |
| 2010-02-04 | 18.51 | 18.00 | 1070500 |
| 2010-02-03 | 18.58 | 18.56 | 279400 |
| 2010-02-02 | 18.49 | 18.62 | 618300 |
| 2010-02-01 | 18.30 | 18.42 | 561000 |
| 2010-01-29 | 18.45 | 18.22 | 580700 |
| 2010-01-28 | 18.63 | 18.40 | 711200 |
| 2010-01-27 | 18.55 | 18.57 | 531500 |
| 2010-01-26 | 18.78 | 18.60 | 1858100 |
| 2010-01-25 | 18.84 | 18.90 | 341700 |
| 2010-01-22 | 18.95 | 18.72 | 641400 |
| 2010-01-21 | 19.30 | 19.07 | 966800 |
| 2010-01-20 | 19.62 | 19.34 | 518200 |
| 2010-01-19 | 19.46 | 19.59 | 795500 |
| 2010-01-15 | 19.70 | 19.44 | 1005500 |
Other Companies: 03-22-2009-1 | Daimler AG | 08-20-2008-1
Barrett Business Services Inc. | 09-01-2007 | Evolving Systems Inc.