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|                                                                                                      |   | Three      Months Ended |     |   |                         |   |    |   |   |   |    |   |   |   |    |   |   |   |
|-----------------------------------------------------------------------------------------------------------|--------|-------------------------|----------|--------|------------------------------|--------|---------|--------|--------|--------|---------|--------|--------|--------|---------|--------|--------|--------|
|                                                                                                      |   | March      31,          |     |   | Year      Ended December 31, |   |
|                                                                                                      |   | 2008                    |     |   | 2007                         |   |    | 2006   |   |   | 2005    |   |   | 2004   |    |   | 2003   |   |
| Fixed      charges, as defined by the Securities and Exchange                                             |   |                    |     |   |                         |   |    |   |   |   |    |   |   |   |    |   |   |   |
| Commission:                                                                                               |   |                    |     |   |                         |   |    |   |   |   |    |   |   |   |    |   |   |   |
|                                                                                                      |   |                    |     |   |                         |   |    |   |   |   |    |   |   |   |    |   |   |   |
| Interest      on long-term debt                                                                           |   | $                       | 18,908   |   |                         | $      | 81,638  |   |   | $      | 84,773  |   |   | $      | 66,042  |   |   | $      | 34,488 |   |   | $ | 48,483 |   |
| Amortization      of debt premium, discount and expenses                                                  |   |                    | 1,758    |   |                         |   | 6,566   |   |   |   | 4,729   |   |   |   | 3,962   |   |   |   | 3,036 |   |   |   | 2,990 |   |
| Other      interest                                                                                       |   |                    | 7,237    |   |                         |   | 32,242  |   |   |   | 44,918  |   |   |   | 13,734  |   |   |   | 1,976 |   |   |   | 3,922 |   |
| Estimated      interest factor of lease rental charges                                                    |   |                    | 4,463    |   |                         |   | 19,308  |   |   |   | 19,235  |   |   |   | 19,934  |   |   |   | 18,843 |   |   |   | 19,568 |   |
| Interest      capitalized                                                                                 |   |                    | 172      |   |                         |   | 4,119   |   |   |   | 2,982   |   |   |   | 1,421   |   |   |   | 957 |   |   |   | 1,163 |   |
| Preferred      dividend requirements of subsidiaries                                                      |   |                    | 210      |   |                         |   | 556     |   |   |   | 798     |   |   |   | 4,063   |   |   |   | 881 |   |   |   | 845 |   |
|      Total      Fixed Charges                                                    |   | $                       | 32,748   |   |                         | $      | 144,429 |   |   | $      | 157,435 |   |   | $      | 109,156 |   |   | $      | 60,181 |   |   | $ | 76,971 |   |
|                                                                                                      |   |                    |     |   |                         |   |    |   |   |   |    |   |   |   |    |   |   |   |   |   |   |   |   |   |
|                                                                                                      |   |                    |     |   |                         |   |    |   |   |   |    |   |   |   |    |   |   |   |   |   |   |   |   |   |
|                                                                                                      |   |                    |     |   |                         |   |    |   |   |   |    |   |   |   |    |   |   |   |   |   |   |   |   |   |
| Earnings,      as defined by the Securities and Exchange                                                  |   |                    |     |   |                         |   |    |   |   |   |    |   |   |   |    |   |   |   |   |   |   |   |   |   |
| Commission:                                                                                               |   |                    |     |   |                         |   |    |   |   |   |    |   |   |   |    |   |   |   |   |   |   |   |   |   |
|                                                                                                      |   |                    |     |   |                         |   |    |   |   |   |    |   |   |   |    |   |   |   |   |   |   |   |   |   |
| Earnings      (loss) from continuing operations before income taxes                                       |   | $                       | (113,056 | )      |                         | $      | 63,112  |   |   | $      | 164,018 |   |   | $      | 76,502  |   |   | $      | 107,060 |   |   | $ | 68,267 |   |
| (Earnings)      loss of equity investee                                                                   |   |                    | 25,083   |   |                         |   | (7,581  | )      |   |   | -       |   |   |   | -       |   |   |   | - |   |   |   | - |   |
| Earnings      (loss) from continuing operations before income taxes      and  investee earnings |   |                    | (87,973  | )      |                         |   | 55,531  |   |   |   | 164,018 |   |   |   | 76,502  |   |   |   | 107,060 |   |   |   | 68,267 |   |
| Fixed      charges as above                                                                               |   |                    | 32,748   |   |                         |   | 144,429 |   |   |   | 157,435 |   |   |   | 109,156 |   |   |   | 60,181 |   |   |   | 76,971 |   |
| Interest      capitalized                                                                                 |   |                    | (172     | )      |                         |   | (4,119  | )      |   |   | (2,982  | )      |   |   | (1,421  | )      |   |   | (957 | ) |   |   | (1,163 | ) |
| Preferred      dividend requirements of subsidiaries                                                      |   |                    | (210     | )      |                         |   | (556    | )      |   |   | (798    | )      |   |   | (4,063  | )      |   |   | (881 | ) |   |   | (845 | ) |
|                                                                                                      |   |                    |     |   |                         |   |    |   |   |   |    |   |   |   |    |   |   |   |   |   |   |   |   |   |
| Earnings      (Loss) Available for Fixed Charges                                                          |   | $                       | (55,607  | )      |                         | $      | 195,285 |   |   | $      | 317,673 |   |   | $      | 180,174 |   |   | $      | 165,403 |   |   | $ | 143,230 |   |
|                                                                                                      |   |                    |     |   |                         |   |    |   |   |   |    |   |   |   |    |   |   |   |   |   |   |   |   |   |
| Ratio      of Earnings to Fixed Charges                                                                   |   |                    | N/M      | *      |                         |   | 1.35    |   |   |   | 2.02    |   |   |   | 1.65    |   |   |   | 2.75 |   |   |   | 1.86 |   |
|                                                                                                      |   |                    |     |   |                         |   |    |   |   |   |    |   |   |   |    |   |   |   |   |   |   |   |   |   |

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