| (in      millions, except ratios)                                                               |   | 2009   |    |   | 2008   |   |   | 2007   |   |   | 2006    |   |   | 2005   |   |
|-------------------------------------------------------------------------------------------------|--------|--------|---------|--------|--------|--------|--------|--------|--------|--------|---------|--------|--------|--------|--------|
| Earnings:                                                                                       |   |   |    |   |   |   |   |   |   |   |    |   |   |   |   |
| Income      (loss) before income tax expense (benefit) and accounting      change               |   | $      | 183.8   |   |   | $      | (153.3 | )      |   | $      | 215.0   |   |   | $      | (94.7  | ) |   | $ | 124.2 |   |
| Less:      Capitalized interest                                                                 |   |   | (7.3    | )      |   |   | (20.2  | )      |   |   | (25.7   | )      |   |   | (21.5  | ) |   |   | (8.1 | ) |
| Add:                                                                                            |   |   |    |   |   |   |   |   |   |   |    |   |   |   |   |   |   |   |   |   |
| Interest      on indebtedness                                                                   |   |   | 88.1    |   |   |   | 92.5   |   |   |   | 86.2    |   |   |   | 71.5   |   |   |   | 50.2 |   |
| Amortization      of debt expense                                                               |   |   | 3.6     |   |   |   | 2.3    |   |   |   | 1.9     |   |   |   | 1.8    |   |   |   | 1.0 |   |
| Amortization      of capitalized interest                                                       |   |   | 6.7     |   |   |   | 6.0    |   |   |   | 5.4     |   |   |   | 4.8    |   |   |   | 4.7 |   |
| Portion      of rent under long-term operating leases representative of an interest      factor |   |   | 74.5    |   |   |   | 73.8   |   |   |   | 77.0    |   |   |   | 73.8   |   |   |   | 74.7 |   |
|                                                                                            |   |   |    |   |   |   |   |   |   |   |    |   |   |   |   |   |   |   |   |   |
| Earnings      Available for Fixed Charges                                                       |   | $      | 349.4   |   |   | $      | 1.1    |   |   | $      | 359.8   |   |   | $      | 35.7   |   |   | $ | 246.7 |   |
|                                                                                            |   |   |    |   |   |   |   |   |   |   |    |   |   |   |   |   |   |   |   |   |
| Fixed      Charges:                                                                             |   |   |    |   |   |   |   |   |   |   |    |   |   |   |   |   |   |   |   |   |
| Interest                                                                                        |   |   | 88.1    |   |   |   | 92.5   |   |   |   | 86.2    |   |   |   | 71.5   |   |   |   | 50.2 |   |
| Amortization      of debt expense                                                               |   |   | 3.6     |   |   |   | 2.3    |   |   |   | 1.9     |   |   |   | 1.8    |   |   |   | 1.0 |   |
| Amortization      of capitalized interest                                                       |   |   | 6.7     |   |   |   | 6.0    |   |   |   | 5.4     |   |   |   | 4.8    |   |   |   | 4.7 |   |
| Portion      of rent under long-term operating leases representative of an interest      factor |   |   | 74.5    |   |   |   | 73.8   |   |   |   | 77.0    |   |   |   | 73.8   |   |   |   | 74.7 |   |
|                                                                                            |   |   |    |   |   |   |   |   |   |   |    |   |   |   |   |   |   |   |   |   |
| Total      Fixed Charges                                                                        |   | $      | 172.9   |   |   | $      | 174.6  |   |   | $      | 170.5   |   |   | $      | 151.9  |   |   | $ | 130.6 |   |
|                                                                                            |   |   |    |   |   |   |   |   |   |   |    |   |   |   |   |   |   |   |   |   |
| Ratio      of Earnings to Fixed Charges                                                         |   |   | 2.02    |   |   |   | 0.01   |   |   |   | 2.11    |   |   |   | 0.24   |   |   |   | 1.89 |   |
|                                                                                            |   |   |    |   |   |   |   |   |   |   |    |   |   |   |   |   |   |   |   |   |
| Coverage      deficiency                                                                        |   | $      | — |   |   | $      | 173.5  |   |   | $      | — |   |   | $      | 116.2  |   |   | $ | — |   |