| Symbol | Relationship | Date | Transaction | Cost | # Shares | Value($) | Total Shares | Form 4 |
| DPS | Executive Vice President | Mar 07, 2012 | Sale | $37.70 | 8,950 | 337,415 | 11,129 | Mar 07, 2012, 05:52 PM |
| DPS | Executive Vice President | Mar 06, 2012 | Sale | $37.83 | 19,649 | 743,345 | 20,079 | Mar 07, 2012, 05:52 PM |
| DPS | Executive Vice President | Mar 05, 2012 | Sale | $37.76 | 10,034 | 378,880 | 39,728 | Mar 07, 2012, 05:52 PM |
| DPS | Executive Vice President | Mar 02, 2012 | Option Exercise | $13.48 | 58,787 | 792,449 | 69,916 | Mar 06, 2012, 05:23 PM |
| DPS | Executive Vice President | Mar 02, 2012 | Sale | $37.76 | 58,787 | 2,219,750 | 11,129 | Mar 06, 2012, 05:23 PM |
| DPS | Executive Vice President | May 11, 2011 | Sale | $40.48 | 5,812 | 235,287 | 10,865 | May 13, 2011, 04:54 PM |
| DPS | Executive Vice President | Sep 02, 2010 | Sale | $37.98 | 18,520 | 703,437 | 6,833 | Sep 07, 2010, 05:35 PM |
| Symbol | Relationship | Date | Transaction | Value($) |
| DPS | Executive Vice President | Mar 07, 2012 | Sale | 337,415 |
| DPS | Executive Vice President | Mar 06, 2012 | Sale | 743,345 |
| DPS | Executive Vice President | Mar 05, 2012 | Sale | 378,880 |
| DPS | Executive Vice President | Mar 02, 2012 | Option Exercise | 792,449 |
| DPS | Executive Vice President | Mar 02, 2012 | Sale | 2,219,750 |
| DPS | Executive Vice President | May 11, 2011 | Sale | 235,287 |
| DPS | Executive Vice President | Sep 02, 2010 | Sale | 703,437 |