(Amounts in thousands, except per share information) 1997 1996  1995  1994 (a) 1993 1992 (b) 1991 $ 4,113,339 $ 3,586,448 $ 3,214,370 $ 2,576,337 $ 2,489,323 $ 2,375,808 $ 2,440,815 3,175,246 2,756,343 2,448,264 2,053,376 2,004,955 1,925,800 1,977,381 475,180 425,449 384,581 302,668 310,765 282,861 289,535 54,256 22,879 14,798 14,350 46,659 36,667 30,922 37,832 47,056 52,190 59,369 150,828 134,812 130,169 60,274 43,010 41,912 44,300 274,039 239,667 218,238 52,175 65,056 63,479 59,168 274,039 239,667 218,238 47,652 65,056 11,218 59,168 2.46 2.15 1.97 .48 .60 .58 .54 2.44 2.14 1.96 .48 .59 .58 .54 2.46 2.15 1.97 .43 .60 .10 .54 $ 2.44 $ 2.14 $ 1.96 $ .43 $ .59 $ .10 $ .54 111,602 111,261 110,576 109,661 109,064 108,644 108,632 112,518 112,189 111,149 110,270 109,379 108,995 109,188 $ .506 $ .480 $ .453 $ .436 $ .427 $  .413 $ .409 6.7% 6.7% 6.8% 1.8% 2.6% 0.5% 2.4% 9.3% 9.2% 10.3% 2.5% 3.3% 0.6% 3.0% 18.7% 18.6% 20.2% 5.0% 7.0% 1.2% 6.3% $ 13.87 $ 12.42 $  10.73 $ 8.78 $ 8.53 $  8.58 $  8.70 $ 783,550 $ 635,242 $ 593,761 $ 526,864 $ 588,189 $ 672,173 $ 649,474 2.1 1.8 1.9 2.0 2.3 2.8 2.8 $ 1,020,743 $ 991,777 $ 815,771  $ 717,300 $ 736,056 $ 752,490 $ 757,937 2,998,946 2,887,124 2,302,209 1,925,744 1,963,590 1,958,120 1,920,697 432,885 439,797 237,157 257,259 378,476 446,974 476,586 $ 1,547,301 $ 1,383,958 $ 1,191,514 $ 966,351 $ 932,900 $ 934,019 $ 943,475 24.5% 30.7% 21.9% 22.7% 33.3% 34.0% 35.4% $ 146,253 $ 126,544 $ 110,527 $ 106,546 $ 109,673 $ 102,628 $ 98,919 $ 189,201 $ 201,693 $ 151,963 $ 99,914 $ 91,484 $ 84,955 $ 112,047 34,927 33,289 30,590 26,730 25,646 26,669 27,793 43,014 35,403 35,629 29,625 30,414 30,836 32,812 111,527 111,438 111,003 110,115 109,352 108,920 108,461 1,800 4,500 5,400 3,600 2,700 900 3,600 4,500 2,700 1,800 900 3,600 4,500 1,800 2,700 900 5,400 Total Assets Millions of Dollars 91 92 93 94 95 96 97 98 99 00 01 Shareholders' Equity Millions of Dollars Long-Term Debt Millions of Dollars 5,400 91 92 93 94 95 96 97 98 99 00 01 91 92 93 94 95 96 97 98 99 00 01 37