Exhibit 12a
                STATEMENT SETTING FORTH COMPUTATIONS OF RATIOS OF
                            EARNINGS TO FIXED CHARGES
                             (Dollars in Thousands)
<TABLE>
<CAPTION>

                                                                  Year Ended December 31,
                                                1999           1998           1997           1996           1995
------------------------------------- --------------- -------------- -------------- -------------- --------------
<S>                                   <C>             <C>            <C>            <C>            <C>
EARNINGS AVAILABLE FOR
 FIXED CHARGES
  Pre-tax income:
    Income from continuing

      operations per statement
      of income                             $185,567       $169,612       $125,698       $167,351       $128,382
    Federal income taxes                     109,164        105,814         44,916        106,876         91,519
    Federal income taxes charged
      to other income - net                    2,909          3,986         14,807           (784)       (11,967)
    Capitalized interest                      (3,692)        (1,782)          (360)          (600)          (660)
    Undistributed (earnings) or
      losses of less-than-
      fifty-percent-owned
      entities                                    --             --           (608)           460          8,325
------------------------------------- --------------- -------------- -------------- -------------- --------------
Total                                       $293,948       $277,630       $184,453       $273,303       $215,599
------------------------------------- --------------- -------------- -------------- -------------- --------------

  Fixed charges:
    Interest expense                        $160,966       $146,248       $123,543       $122,635       $131,346
    Other interest                             3,692          1,782            360            600            660
    Portion of rentals
      representative of the
      interest factor                          4,575          2,878          3,143          4,187          5,150
------------------------------------- --------------- -------------- -------------- -------------- --------------
Total                                       $169,233       $150,908       $127,046       $127,422       $137,156
------------------------------------- --------------- -------------- -------------- -------------- --------------

  Earnings available for

    combined fixed charges                  $463,181       $428,538       $311,499       $400,725       $352,755
RATIO OF EARNINGS TO
  FIXED CHARGES                                2.74x          2.84x          2.45x          3.14x          2.57x

</TABLE>
<PAGE>
                                                                     Exhibit 12b

                STATEMENT SETTING FORTH COMPUTATIONS OF RATIOS OF
        EARNINGS TO COMBINED FIXED CHARGES AND PREFERRED STOCK DIVIDENDS
                             (Dollars in Thousands)
<TABLE>
<CAPTION>
                                                            Year Ended December 31,
                                                1999          1998          1997         1996         1995
--------------------------------------- ------------- ------------- ------------- ------------ ------------
<S>                                     <C>           <C>           <C>           <C>          <C>
EARNINGS AVAILABLE FOR COMBINED
 FIXED CHARGES AND PREFERRED
 DIVIDEND REQUIREMENTS

  Pretax income:
    Income from continuing

      operations per statement
      of income                             $185,567      $169,612      $125,698     $167,351     $128,382
    Federal income taxes                     109,164       105,814        44,916      106,876       91,519
    Federal income taxes charged
      to other income - net                    2,909         3,986        14,807         (784)     (11,967)
Subtotal                                     297,640       279,412       185,421      273,443      207,934
  Capitalized interest                        (3,692)       (1,782)         (360)        (600)        (660)
  Undistributed (earnings) or
    losses of less-than-fifty-
    percent-owned entities                        --            --          (608)         460        8,325
--------------------------------------- ------------- ------------- ------------- ------------ ------------
Total                                       $293,948      $277,630      $184,453     $273,303     $215,599
--------------------------------------- ------------- ------------- ------------- ------------ ------------

  Fixed charges:
    Interest expense                        $160,966      $146,248      $123,543     $122,635     $131,346
    Other interest                             3,692         1,782           360          600          660
    Portion of rentals
      representative of the
      interest factor                          4,575         2,878         3,143        4,187        5,150
--------------------------------------- ------------- ------------- ------------- ------------ ------------
Total                                       $169,233      $150,908      $127,046     $127,422     $137,156
--------------------------------------- ------------- ------------- ------------- ------------ ------------

Earnings available for
  combined fixed charges
  and preferred dividend
  requirements                              $463,181      $428,538      $311,499     $400,725     $352,755

DIVIDEND REQUIREMENT:
  Fixed charges above                       $169,233      $150,908      $127,046     $127,422     $137,156
  Preferred dividend
    requirements below                        17,747        21,421        26,266       36,242       36,693
--------------------------------------- ------------- ------------- ------------- ------------ ------------
Total                                       $186,980      $172,329      $153,312     $163,664     $173,849
--------------------------------------- ------------- ------------- ------------- ------------ ------------
</TABLE>
<PAGE>
<TABLE>
<CAPTION>
                                                     Year Ended December 31,
                                              1999        1998         1997        1996         1995
--------------------------------------- ----------- ----------- ------------ ----------- ------------
<S>                                     <C>         <C>         <C>          <C>         <C>
RATIO OF EARNINGS TO COMBINED
  FIXED CHARGES AND PREFERRED
  DIVIDEND REQUIREMENTS                       2.48        2.49         2.03        2.45         2.03

COMPUTATION OF PREFERRED
  DIVIDEND REQUIREMENTS:
  (a) Pre-tax income                      $297,640    $279,412    $185, 421    $273,443     $207,934
  (b) Income from continuing
        operations                        $185,567    $169,612     $125,698    $167,351     $128,382
  (c) Ratio of (a) to (b)                   1.6039      1.6474       1.4751      1.6339       1.6197
  (d) Preferred dividends                 $ 11,065    $ 13,003     $ 17,806    $ 22,181     $ 22,654
  Preferred dividend
    requirements

      [(d) multiplied by (c)]             $ 17,747    $ 21,421     $ 26,266    $ 36,242     $ 36,693

</TABLE>