|                                                                                                                                 |   | Year      Ended December 31, |      |
|--------------------------------------------------------------------------------------------------------------------------------------|--------|------------------------------|-----------|
|                                                                                                                                 |   | 2007                         |      |   | 2006 |   |   | 2005 |   |   | 2004 |   |   | 2003 |   |
|                                                                                                                                 |   | (in      thousands)          |      |
| Income      from continuing operations before income tax and cumulative      effect of change in accounting      principle |   | $                            | 1,367,567 |   |   | $ | 1,096,217 |   |   | $ | 968,660 |   |   | $ | 513,008 |   |   | $ | 140,405 |   |
| Add      (deduct)                                                                                                                    |   |                         |      |   |   |   |   |   |   |   |   |   |   |   |   |   |   |   |   |   |
|    Fixed charges                                                                                                      |   |                         | 133,794   |   |   |   | 133,644 |   |   |   | 99,375 |   |   |   | 62,747 |   |   |   | 62,075 |   |
|    Interest      capitalized                                                                                          |   |                         | (16,595   | ) |   |   | (12,515 | ) |   |   | (8,684 | ) |   |   | (8,168 | ) |   |   | (13,430 | ) |
|    Income      from equity investees                                                                                  |   |                         | (210,928  | ) |   |   | (139,362 | ) |   |   | (90,812 | ) |   |   | (78,199 | ) |   |   | (45,186 | ) |
|    Distributed      income of equity investees                                                                        |   |                         | 226,634   |   |   |   | 37,350 |   |   |   | 59,625 |   |   |   | 57,825 |   |   |   | 46,125 |   |
| Earnings      as defined                                                                                                             |   | $                            | 1,500,472 |   |   | $ | 1,115,334 |   |   | $ | 1,028,164 |   |   | $ | 547,213 |   |   | $ | 189,989 |   |
| Net      interest expense                                                                                                            |   |                         | 112,957   |   |   |   | 117,045 |   |   |   | 87,541 |   |   | $ | 53,460 |   |   | $ | 47,681 |   |
| Interest      capitalized                                                                                                            |   |                         | 16,595    |   |   |   | 12,515 |   |   |   | 8,684 |   |   |   | 8,168 |   |   |   | 13,430 |   |
| Interest      portion of rental expense                                                                                              |   |                         | 4,242     |   |   |   | 4,084 |   |   |   | 3,150 |   |   |   | 1,119 |   |   |   | 964 |   |
| Fixed      charges as defined                                                                                                        |   | $                            | 133,794   |   |   | $ | 133,644 |   |   | $ | 99,375 |   |   | $ | 62,747 |   |   | $ | 62,075 |   |
| Ratio      of earnings to fixed charges                                                                                              |   |                         | 11.2      |   |   |   | 8.3 |   |   |   | 10.3 |   |   |   | 8.7 |   |   |   | 3.1 |   |

----