Six Months Ended Three Months Ended June 30 June 30 1998 1997 1998 1997 Basic: Average shares outstanding 18,297,418 18,116,990 18,415,792 18,133,025 Net earnings applicable to common stock and common stock equivalents $10,591,000 $9,805,000 $5,686,000 $5,418,000 Basic earnings per share $0.58 $0.54 $0.31 $0.30 Diluted: Average shares outstanding 18,297,418 18,116,990 18,415,792 18,133,025 Net effect of dilutive stock options based on treasury stock method using the average market price to common stock and common stock equivalents 121,337 56,444 133,828 50,934 Average number of common shares and common equivalent shares 18,418,755 18,173,434 18,549,620 18,183,959 Net earnings applicable to common stock and common stock equivalents $10,591,000 $9,805,000 $5,686,000 $5,418,000 Diluted earnings per share $0.58 $0.54 $0.31 $0.30