| Date | Open | Close | Volume |
| 2010-03-03 | 12.09 | 12.20 | 3100 |
| 2010-03-02 | 12.34 | 11.99 | 2200 |
| 2010-03-01 | 12.28 | 12.17 | 5500 |
| 2010-02-26 | 12.30 | 12.11 | 1400 |
| 2010-02-25 | 12.00 | 12.06 | 11100 |
| 2010-02-24 | 12.00 | 12.14 | 9700 |
| 2010-02-23 | 12.00 | 11.98 | 5400 |
| 2010-02-22 | 11.89 | 12.05 | 14300 |
| 2010-02-19 | 11.75 | 11.80 | 8100 |
| 2010-02-18 | 11.86 | 11.98 | 6700 |
| 2010-02-17 | 12.25 | 11.98 | 10900 |
| 2010-02-16 | 12.27 | 12.25 | 2900 |
| 2010-02-12 | 11.46 | 11.97 | 16300 |
| 2010-02-11 | 11.75 | 11.69 | 5700 |
| 2010-02-10 | 11.13 | 11.53 | 11700 |
| 2010-02-09 | 11.02 | 10.93 | 5300 |
| 2010-02-08 | 10.96 | 10.91 | 28900 |
| 2010-02-05 | 11.07 | 11.15 | 9600 |
| 2010-02-04 | 11.51 | 11.07 | 15700 |
| 2010-02-03 | 11.72 | 11.66 | 500 |
| 2010-02-02 | 11.65 | 11.80 | 7000 |
| 2010-02-01 | 12.00 | 11.81 | 30500 |
| 2010-01-29 | 12.70 | 12.00 | 13200 |
| 2010-01-28 | 12.46 | 12.36 | 13100 |
| 2010-01-27 | 12.07 | 12.54 | 10200 |
| 2010-01-26 | 11.69 | 12.27 | 44800 |
| 2010-01-25 | 12.20 | 11.98 | 41500 |
| 2010-01-22 | 11.31 | 11.95 | 62000 |
| 2010-01-21 | 12.06 | 11.52 | 56600 |
| 2010-01-20 | 13.19 | 12.20 | 111200 |
| 2010-01-19 | 13.70 | 13.11 | 45000 |
| 2010-01-15 | 14.40 | 13.90 | 25300 |
Other Companies: 05-14-2007 | Syngenta AG | 04-03-2008
Marsh & McLennan Companies, Inc. | 06-28-2008-1 | Nuveen Premium Income Municipal Fund Inc.