|                                                                                         |   | Year      Ended December 31, |    |         |  Twelve Months      Ended |         |   |  Three      Months      Ended |    |
|----------------------------------------------------------------------------------------------|--------|------------------------------|---------|--------------|-------------------------------------|--------------|--------|------------------------------------|---------|
|                                                                                         |   | 2004                         |    | 2005         |                                | 2006         |   | 2007                               |    | 2008 |   |   | 3/31/2009 |   |   | 3/31/2009  |   |
| EARNINGS                                                                                     |   |                    |    |    |                                |    |   |                          |    |    |   |   |   |   |   |   |   |
| Income      Before Income Taxes                                                              |   | $                            | 207,929 |         | $                                   | 199,259      |   | $                                  | 286,422 |   | $ | 387,473 |   | $ | 346,869 |   | $ | 303,340 |   | $ | 72,969 |   |
| Fixed      Charges (as below)                                                                |   |                         | 61,742  |         |                                | 63,665       |   |                               | 74,155  |   |   | 86,900 |   |   | 109,245 |   |   | 111,856 |   |   | 26,506 |   |
| Total      Earnings                                                                          |   | $                            | 269,671 |         | $                                   | 262,924      |   | $                                  | 360,577 |   | $ | 474,373 |   | $ | 456,114 |   | $ |  415,196 |   | $ |  99,475 |   |
|                                                                                         |   |                         |    |         |                                |         |   |                               |    |   |   |   |   |   |   |   |   |   |   |   |   |   |
| FIXED CHARGES                                                                           |   |                         |    |         |                                |         |   |                               |    |   |   |   |   |   |   |   |   |   |   |   |   |   |
| Interest      Expense                                                                        |   | $                            | 54,246  |         | $                                   | 59,539       |   | $                                  | 66,100  |   | $ | 69,625 |   | $ | 92,068 |   | $ | 93,622 |   | $ | 20,793 |   |
| Credit      for Allowance for Borrowed Funds         Used During      Construction |   |                         | 4,996   |         |                                | 1,526        |   |                               | 5,955   |   |   | 7,275 |   |   | 2,677 |   |   | 3,734 |   |   | 2,088 |   |
| Estimated      Interest Element in Lease Rentals                                             |   |                         | 2,500   |         |                                | 2,600        |   |                               | 2,100   |   |   | 10,000 |   |   |  14,500 |   |   | 14,500 |   |   |  3,625 |   |
| Total Fixed      Charges                                                                     |   | $                            | 61,742  |         | $                                   | 63,665       |   | $                                  | 74,155  |   | $ | 86,900 |   | $ | 109,245 |   | $ | 111,856 |   | $ |  26,506 |   |
|                                                                                         |   |                         |    |         |                                |         |   |                               |    |   |   |   |   |   |   |   |   |   |   |   |   |   |
| Ratio of Earnings to Fixed      Charges                                                      |   |                         | 4.36    |         |                                | 4.12         |   |                               | 4.86    |   |   | 5.45 |   |   | 4.17 |   |   |  3.71 |   |   |  3.75 |   |