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EXHIBIT 12

Calculation of Ratio of Earnings to Fixed Charges

|                                                                                                                                                                   |  | 2010   |  |  | 2009    |  |  | 2008    |  |  | 2007    |  |  | 2006    | 
|------------------------------------------------------------------------------------------------------------------------------------------------------------------ |  | ------ |  |  | ------- |  |  | ------- |  |  | ------- |  |  | ------- | 
|                                                                                                                                                                   |  |        |  |  |         |  |  |         |  |  |         |  |  |         | 
|Fixed charges                                                                                                                                                      |  |        |  |  |         |  |  |         |  |  |         |  |  |         | 
|Interest expensed and capitalized                                                                                                                                  |  | 1,047  |  |  | 9,462   |  |  | 11,689  |  |  | 12,012  |  |  | 8,749   | 
|Amortized premiums, discounts and capitalized expenses related
      to indebtedness                                                                               |  |        |  |  |         |  |  |         |  |  |         |  |  | -       | 
|Estimate of the interest within rental expense                                                                                                                     |  | 472    |  |  | 365     |  |  | 381     |  |  | 357     |  |  | 297     | 
|Preference security dividend requirements of consolidated subsidiaries                                                                                             |  | -      |  |  | -       |  |  | -       |  |  | -       |  |  | -       | 
|                                                                                                                                                                   |  |        |  |  |         |  |  |         |  |  |         |  |  |         | 
|Fixed charges                                                                                                                                                      |  | 1,519  |  |  | 9,827   |  |  | 12,070  |  |  | 12,369  |  |  | 9,046   | 
|                                                                                                                                                                   |  |        |  |  |         |  |  |         |  |  |         |  |  |         | 
|Earnings                                                                                                                                                           |  |        |  |  |         |  |  |         |  |  |         |  |  |         | 
|Add                                                                                                                                                                |  | 80,399 |  |  | 140,747 |  |  | 138,178 |  |  | 113,646 |  |  | 104,548 | 
|Pretax income from continuing operations before adjustment
      for minority interests in consolidated subsidiaries or income or loss from
      equity investees |  | 78,880 |  |  | 130,920 |  |  | 126,108 |  |  | 101,277 |  |  | 95,502  | 
|Fixed charges                                                                                                                                                      |  | 1,519  |  |  | 9,827   |  |  | 12,070  |  |  | 12,369  |  |  | 9,046   | 
|Amortization of capitalized interest                                                                                                                               |  | -      |  |  | -       |  |  | -       |  |  | -       |  |  | -       | 
|Distributed income of equity investees                                                                                                                             |  | -      |  |  | -       |  |  | -       |  |  | -       |  |  | -       | 
|Your share of pre-tax losses of equity investees for which
      charges arising from guarantees are included in fixed charges                                     |  | -      |  |  | -       |  |  | -       |  |  | -       |  |  | -       | 
|                                                                                                                                                                   |  |        |  |  |         |  |  |         |  |  |         |  |  |         | 
|Less                                                                                                                                                               |  |        |  |  |         |  |  |         |  |  |         |  |  | -       | 
|Interest capitalized                                                                                                                                               |  |        |  |  |         |  |  |         |  |  |         |  |  | -       | 
|Preference security dividend requirements of consolidated
      subsidiaries                                                                                       |  |        |  |  |         |  |  |         |  |  |         |  |  | -       | 
|Minority interest in pre-tax income of subsidiaries
      that have not incurred fixed charges                                                                     |  |        |  |  |         |  |  |         |  |  |         |  |  | -       | 
|                                                                                                                                                                   |  |        |  |  |         |  |  |         |  |  |         |  |  |         | 
|Earnings                                                                                                                                                           |  | 80,399 |  |  | 140,747 |  |  | 138,178 |  |  | 113,646 |  |  | 104,548 | 
|                                                                                                                                                                   |  |        |  |  |         |  |  |         |  |  |         |  |  |         | 
|Ratio of earnings to fixed charges                                                                                                                                 |  | 52.93  |  |  | 14.32   |  |  | 11.45   |  |  | 9.19    |  |  | 11.56   | 

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