1 EXHIBIT 12 Statement Regarding Computation of Ratios The following formulas were used to calculate the ratios in the Selected Financial Data for the years ended December 31, 2000, 1999, 1998, 1997 and 1996, included in this report as Exhibit 13. (Calculation) Net Income/Weighted average shares of common stock outstanding for the period = Earnings Per Share. December 31, -------------------------------------------------------------------------- 2000 1999 1998 1997 1996 ---------- ---------- ---------- ---------- ---------- Net income $3,282,921 $3,018,327 $2,915,961 $3,005,462 $2,746,981 Weighted Average Shares Outstanding 704,498 705,331 666,779 665,215 669,465 Per Share Amount $ 4.66 $ 4.28 $ 4.37 $ 4.52 $ 4.10 Cash dividends/Average Shares Outstanding = Cash dividends declared Per share December 31, -------------------------------------------------------------------------- 2000 1999 1998 1997 1996 ---------- ---------- ---------- ---------- ---------- Cash dividends $1,020,487 $ 881,664 $ 718,882 $ 611,412 $ 507,792 Average shares outstanding 703,784 705,331 684,650 664,578 668,147 Per Share Amount $ 1.45 $ 1.25 $ 1.05 $ .92 $ .76 Shareholders' Equity/Shares Outstanding at period end = Book Value per share December 31, ------------------------------------------------------------------------------- 2000 1999 1998 1997 1996 ----------- ----------- ----------- ----------- ----------- Shareholders' Equity $31,741,165 $28,916,718 $27,437,211 $22,157,609 $19,933,740 Shares outstanding 702,548 705,331 705,331 661,900 667,500 Per Share Amount $ 45.18 $ 41.00 $ 38.90 $ 33.48 $ 29.86 2 Net Income/Average Assets = Return on Average Assets (In Thousands) December 31, -------------------------------------------------------------------- 2000 1999 1998 1997 1996 -------- -------- -------- -------- -------- Net Income $ 3,283 $ 3,018 $ 2,916 $ 3,005 $ 2,747 Average Assets $250,577 $234,279 $208,565 $193,923 $175,807 Return on Average Assets 1.31% 1.29% 1.40% 1.55% 1.56% Net Income/Average Shareholders' equity = Return on Average Equity (In Thousands) December 31, --------------------------------------------------------------- 2000 1999 1998 1997 1996 ------- ------- ------- ------- ------- Net Income $ 3,283 $ 3,018 $ 2,916 $ 3,005 $ 2,747 Average Shareholders' Equity $29,893 $28,238 $23,615 $21,067 $18,858 Return on Average Equity 10.98% 10.69% 12.35% 14.26% 14.57% Cash dividends per share/ Net income per share = Dividends Payout Ratio December 31, ------------------------------------------------------------------------ 2000 1999 1998 1997 1996 ------ ------ ------ ------ ------ Cash dividends per share $ 1.45 $ 1.25 $ 1.05 $ .92 $ .76 Net income per share $ 4.66 $ 4.28 $ 4.37 $ 4.52 $ 4.10 Dividend Payout Ratio 31.12% 29.21% 24.03% 20.35% 18.54% 3 Average Equity/Average Assets = Average Equity To Average Assets (In thousands) December 31, -------------------------------------------------------------------- 2000 1999 1998 1997 1996 -------- -------- -------- -------- -------- Average Shareholders' Equity $ 29,893 $ 28,238 $ 23,615 $ 21,067 $ 18,858 Average Assets $250,577 $234,279 $208,565 $193,923 $175,807 Average Equity to Average Assets 11.93% 12.05% 11.32% 10.86% 10.73% Loans/Total deposits = Loan to Deposit Ratio (In thousands) December 31, -------------------------------------------------------------------- 2000 1999 1998 1997 1996 -------- -------- -------- -------- -------- Total loans $151,800 $143,777 $137,891 $122,034 $116,259 Total deposits $219,168 $201,738 $192,079 $163,809 $157,399 Loan to Deposit Ratio 69.26% 71.27% 71.79% 74.50% 73.86% Allowance for Loan Loss/ Total Loan = Allowance To Total Loan Ratio (In thousands) December 31, -------------------------------------------------------------------- 2000 1999 1998 1997 1996 -------- -------- -------- -------- -------- Allowance $ 2,359 $ 1,888 $ 1,851 $ 1,745 $ 1,653 Total loans $151,800 $143,777 $137,891 $122,034 $116,259 Allowance to total Loan ratio 1.55% 1.31% 1.34% 1.43% 1.42%