EXHIBIT 12.1 Statement Regarding Computation of Ratios Computation of Ratios - ---------------------- The following formulas were used to calculate the ratios in Financial Information and Supplementary Data, page 42, Selected Financial Data for the years ended December 31, 1997, 1996, 1995, 1994 and 1993, included in this report. (Calculation) Net Income/Weighted average shares of common stock outstanding for the period = Earnings Per Share December 31, 1997 1996 1995 1994 1993 ----------- ----------- ----------- ----------- ----------- Net Income $ 1,930,568 $ 1,643,994 $ 1,470,347 $ 1,287,713 $ 1,192,614 Weighted Average Shares Outstanding 1,209,085 1,209,085 1,209,085 1,208,987 1,206,498 Per Share Amount $ 1.60 $ 1.36 $ 1.22 $ 1.07 $ .99 (Calculation) Cash dividends/ Shares issued = Cash dividends declared per share December 31, 1997 1996 1995 1994 1993 ----------- ----------- ----------- ----------- ----------- Cash dividends $ 652,936 $ 573,698 $ 410,525 $ 448,535 $ 410,130 Shares issued 1,209,085 1,209,085 1,209,085 1,209,085 1,209,085 Per Share Amount $ .54 $ .47 $ .34 $ .37 $ .34 (Calculation) Stockholders' Equity/ Shares issued = Book Value per share December 31, 1997 1996 1995 1994 1993 ----------- ----------- ----------- ----------- ----------- Stockholders' Equity $14,128,995 $12,649,278 $11,709,207 $10,367,843 $ 9,755,475 Shares issued 1,209,085 1,209,085 1,209,085 1,209,085 1,209,085 Per Share Amount $ 11.69 $ 10.46 $ 9.68 $ 8.58 $ 8.07 (Calculation) Net Income / Total average assets = Return on Average Assets (In thousands) December 31, 1997 1996 1995 1994 1993 ----------- ----------- ----------- ----------- ----------- Net Income $ 1,931 $ 1,644 $ 1,470 $ 1,288 $ 1,193 Total Average Assets $ 153,290 $ 137,810 $ 124,145 $ 117,996 $ 115,765 Return on Average Assets 1.26% 1.19% 1.18% 1.09% 1.03% (Calculation) Net Income/Average stockholders' equity = Return on Average Equity (In thousands) December 31, 1997 1996 1995 1994 1993 ----------- ----------- ----------- ----------- ----------- Net Income $ 1,931 $ 1,644 $ 1,470 $ 1,288 $ 1,193 Total Average Stockholders' Equity $ 13,400 $ 12,186 $ 11,170 $ 10,253 $ 9,252 Return on Average Equity 14.41% 13.49% 13.16% 12.56% 12.89% (Calculation) Average Equity / Average stockholders' equity = Average Equity to Average Assets (In thousands) December 31, 1997 1996 1995 1994 1993 ----------- ----------- ----------- ----------- ----------- Total Average Stockholders' Equity $ 13,400 $ 12,186 $ 11,170 $ 10,253 $ 9,252 Total Average Assets $ 153,290 $ 137,810 $ 124,145 $ 117,996 $ 115,765 Average Equity to Average Assets 8.74% 8.84% 9.00% 8.69% 7.99% (Calculation) Cash dividends per share/Net income per share = Dividend Payout Ratio December 31, 1997 1996 1995 1994 1993 ----------- ----------- ----------- ----------- ----------- Cash dividends per share $ .54 $ .47 $ .34 $ .37 $ .34 Net income per share $ 1.60 $ 1.36 $ 1.22 $ 1.07 $ .99 Dividend Payout Ratio 33.75% 34.56% 27.87% 34.58% 34.34% (Calculation) Loans/ Total deposits = Loan to Deposit Ratio December 31, 1997 1996 1995 1994 1993 ------------ ------------ ------------ ------------ ------------ Loans $ 95,373,653 $ 80,416,680 $ 72,006,276 $ 61,667,148 $ 55,838,361 Total deposits $137,044,813 $125,271,069 $114,895,154 $105,730,236 $105,790,970 Loan to Deposit Ratio 69.59% 64.19% 62.67% 58.32% 52.78%