Exhibit 12.1



Ratio of Earnings to Fixed Charges



|                                                                        |  |                                   |         |                          |   |         |  |   |        |  |   |         |   |  |   |          |   |  |   |         |  
|----------------------------------------------------------------------- |  | --------------------------------- | ------- | ------------------------ | - | ------- |  | - | ------ |  | - | ------- | - |  | - | -------- | - |  | - | ------- | -
|(in thousands, except ratios)                                           |  | Nine monthsendedSeptember 30,2004 |         | Years ended December 31, |  
|                                                                        |  | 2003                              |         | 2002                     |   | 2001    |  |   | 2000   |  |   | 1999    |  
|Income (loss) before income taxes and extraordinary item                |  | $                                 | 127,461 |                          | $ | 87,716  |  | $ | 36,087 |  | $ | (98,662 | ) |  | $ | (164,151 | ) |  | $ | (69,493 | )
|Add fixed charges                                                       |  |                                   |         |                          |   |         |  |   |        |  |   |         |   |  |   |          |   |  |   |         |  
|Interest expense                                                        |  |                                   | 2,887   |                          |   | 9,765   |  |   | 15,364 |  |   | 17,231  |   |  |   | 15,828   |   |  |   | 5,469   |  
|Interest portion of rent expense                                        |  |                                   | 4,643   |                          |   | 6,113   |  |   | 6,235  |  |   | 7,005   |   |  |   | 4,935    |   |  |   | 3,333   |  
|                                                                        |  |                                   |         |                          |   |         |  |   |        |  |   |         |   |  |   |          |   |  |   |         |  
|Income (loss) before income taxes, extraordinary item and fixed charges |  | $                                 | 134,991 |                          | $ | 103,594 |  | $ | 57,686 |  | $ | (74,426 | ) |  | $ | (143,388 | ) |  | $ | (60,691 | )
|                                                                        |  |                                   |         |                          |   |         |  |   |        |  |   |         |   |  |   |          |   |  |   |         |  
|Fixed charges                                                           |  |                                   |         |                          |   |         |  |   |        |  |   |         |   |  |   |          |   |  |   |         |  
|Interest expense                                                        |  | $                                 | 2,887   |                          | $ | 9,765   |  | $ | 15,364 |  | $ | 17,231  |   |  | $ | 15,828   |   |  | $ | 5,469   |  
|Interest portion of rent expense                                        |  |                                   | 4,643   |                          |   | 6,113   |  |   | 6,235  |  |   | 7,005   |   |  |   | 4,935    |   |  |   | 3,333   |  
|                                                                        |  |                                   |         |                          |   |         |  |   |        |  |   |         |   |  |   |          |   |  |   |         |  
|Fixed charges                                                           |  | $                                 | 7,530   |                          | $ | 15,878  |  | $ | 21,599 |  | $ | 24,236  |   |  | $ | 20,763   |   |  | $ | 8,802   |  
|                                                                        |  |                                   |         |                          |   |         |  |   |        |  |   |         |   |  |   |          |   |  |   |         |  
|Ratio of earnings to fixed charges(1)                                   |  |                                   | 17.9    |                          |   | 6.5     |  |   | 2.7    |  |   | N/A     |   |  |   | N/A      |   |  |   | N/A     |  
|Deficiency of earnings to fixed charges(2)                              |  |                                   | N/A     |                          |   | N/A     |  |   | N/A    |  | $ | (98,662 | ) |  | $ | (164,151 | ) |  | $ | (69,493 | )

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|(1) | Ratio of earnings to fixed charges means the ratio of income before fixed charges and income taxes to fixed charges, where fixed charges are the aggregate of
interest expense, including amortization of debt issuance costs, and an allocation of rental charges to approximate equivalent interest.
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|(2) | Due to net losses incurred in 2001, 2000 and 1999, the ratio of earnings to fixed charges in
those years was less than 1:1. We would have had to generate additional earnings in the amounts indicated in the table to have achieved a ratio of 1:1.
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