##### 



SixLine
    
    
    Months Ended
    
    
    Year Ended December 31,No.
    
    
    06/30/07
    
    
    12/31/06
    
    
    12/31/05
    
    
    12/31/04
    
    
    12/31/03
    
    
    12/31/02
    
    
    12/31/01Fixed charges, as defined by the Securities and Exchange
Commission:1
    
    Interest on Long-term Debt
    
    $
    42,743
    
    
    $
    95,301
    
    
    $
    75,736
    
    
    $
    46,702
    
    
    $
    59,429
    
    
    $
    56,409
    
    
    $
    62,7162
    
    Amortization of Debt Premium, Discount and Expenses
    
    
    3,177
    
    
    
    4,417
    
    
    
    3,642
    
    
    
    2,697
    
    
    
    2,838
    
    
    
    2,302
    
    
    
    2,3463
    
    Other Interest
    
    
    21,982
    
    
    
    45,811
    
    
    
    14,299
    
    
    
    2,319
    
    
    
    5,423
    
    
    
    2,859
    
    
    
    (42
    )4
    
    Estimated Interest Factor of Lease Rental Charges
    
    
    11,431
    
    
    
    19,714
    
    
    
    20,643
    
    
    
    19,617
    
    
    
    20,452
    
    
    
    23,233
    
    
    
    22,8565
    
    Total Fixed Charges
    
    
    79,333
    
    
    
    165,243
    
    
    
    114,320
    
    
    
    71,335
    
    
    
    88,142
    
    
    
    84,803
    
    
    
    87,8766
    
    Preferred dividend requirements
    
    
    264
    
    
    
    528
    
    
    
    2,868
    
    
    
    572
    
    
    
    586
    
    
    
    586
    
    
    
    5867
    
    Total Fixed Charges and Preferred Dividend
Requirements
    
    $
    79,597
    
    
    $
    165,771
    
    
    $
    117,188
    
    
    $
    71,907
    
    
    $
    88,728
    
    
    $
    85,389
    
    
    $
    88,462Earnings, as defined by the Securities and Exchange
Commission:8
    
    Consolidated Net Earnings from Continuing Operations
    
    $
    49,906
    
    
    $
    121,346
    
    
    $
    69,725
    
    
    $
    86,962
    
    
    $
    57,842
    
    
    $
    62,976
    
    
    $
    149,1379
    
    Income Taxes
    
    
    2,923
    
    
    
    63,970
    
    
    
    32,861
    
    
    
    49,247
    
    
    
    27,889
    
    
    
    33,032
    
    
    
    81,06310
    
    (Earnings) of Equity Investee
    
    
    (1,610
    )
    
    
    
    
    
    
    
    
    
    
    
    
    
    
    
    
    
    
    
    
    
    
    11
    
    Add Fixed Charges as Above
    
    
    79,333
    
    
    
    165,243
    
    
    
    114,320
    
    
    
    71,335
    
    
    
    88,142
    
    
    
    84,803
    
    
    
    87,87612
    
    Earnings Availabe for Fixed Charges
    
    $
    130,552
    
    
    $
    350,559
    
    
    $
    216,906
    
    
    $
    207,544
    
    
    $
    173,873
    
    
    $
    180,811
    
    
    $
    318,07613
    
    Ratio for Earnings to Fixed Charges and Preferred Dividend
Requirements
    
    
    1.64
    
    
    
    2.11
    
    
    
    1.85
    
    
    
    2.89
    
    
    
    1.96
    
    
    
    2.12
    
    
    
    3.60