| **Exhibit 12.1**                                                       |
|------------------------------------------------------------------------|
| ** **                                                             | ** ** | ** ** | ** ** | ** ** | ** ** | ** ** | ** ** | ** ** | ** ** | ** ** | ** ** |
| **Statement of Computation of Ratio of Earnings to Fixed  Charges(1)** |
| ** **                                                             | ** ** | ** ** | ** ** | ** ** | ** ** | ** ** | ** ** | ** ** | ** ** | ** ** | ** ** | ** ** | ** ** |
| ** **                                                             | ** ** | ** ** | ** ** | ** ** | ** ** | ** ** | ** ** | ** ** | ** ** | ** ** | ** ** | ** ** | ** ** |
| ** **                                                             | ** ** | ** ** | ** ** | ** ** | ** ** | ** ** | ** ** | ** ** | ** ** | ** ** | ** ** | **Three Months** | ** ** |
| ** **                                                             | ** ** | ** ** | ** ** | ** ** | ** ** | ** ** | ** ** | ** ** | ** ** | ** ** | ** ** | **Ended** | ** ** |
| ** **                                                             | ** ** | ** ** | ** ** | ** ** | ** ** | ** ** | ** ** | ** ** | ** ** | ** ** | ** ** | **March 31** | ** ** |
| ** **                                                             | ** ** | **2000** | ** ** | **2001** | ** ** | **2002** | ** ** | **2003** | ** ** | **2004** | ** ** | **2005** | ** ** |
|                                                                   |   |   |   |   |   | **(in  thousands)** |   |   |   |   |   |
| **Earnings**                                                           |   |   |   |   |   |   |   |   |   |   |   |   |   |
| Income From Continuing Operations *                                    |   | 65,951 |   | 92,533 |   | 105,882 |   | 104,958 |   | 115,347 |   | 42,837 |   |
| Fixed Charges                                                          |   | 51,062 |   | 68,217 |   | 73,381 |   | 93,294 |   | 80,695 |   | 21,521 |   |
| Distributed Income of Equity Investment                                |   |   |   |   |   |   |   |   |   |   |   |   |   |
|                                                                   | — |   | 40,800 |   | 30,938 |   | 28,003 |   | 47,213 |   | 4,719 |   |
| Capitalized Interest                                                   |   | (4,559 | ) | (4,000 | ) | (4,345 | ) | (5,290 | ) | (4,227 | ) | (1,102 | ) |
| Total Earnings                                                         |   | 112,454 |   | 197,550 |   | 205,856 |   | 220,965 |   | 239,028 |   | 67,975 |   |
|                                                                   |   |   |   |   |   |   |   |   |   |   |   |   |   |
| **Fixed Charges**                                                      |   |   |   |   |   |   |   |   |   |   |   |   |   |
| Interest Expense                                                       |   | 44,423 |   | 62,057 |   | 66,192 |   | 84,250 |   | 72,053 |   | 19,287 |   |
| Capitalized Interest                                                   |   | 4,559 |   | 4,000 |   | 4,345 |   | 5,290 |   | 4,227 |   | 1,102 |   |
| Rental Interest Factor                                                 |   | 2,080 |   | 2,160 |   | 2,844 |   | 3,754 |   | 4,415 |   | 1,132 |   |
| Total Fixed Charges                                                    |   | 51,062 |   | 68,217 |   | 73,381 |   | 93,294 |   | 80,695 |   | 21,521 |   |
|                                                                   |   |   |   |   |   |   |   |   |   |   |   |   |   |
| **Ratio: Earnings / Fixed Charges**                                    |   | 2.20 |   | 2.90 |   | 2.81 |   | 2.37 |   | 2.96 |   | 3.16 |   |

 

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*              Excludesminority interest, extraordinary loss, gain on sale of assets and undistributedequity earnings

 

(1)           Amounts presented for the years 2000through 2004 have been modified from previous presentations. The differencebetween the current presentation and previous presentations is not greater than0.11 for any given year.