consolidated statements of earnings    in thousands except share data years ended December 31, 1997 1996 1995 revenues    Airfreight $  659,480 512,104 405,923 Ocean freight 180,555 148,907 124,105 Customs brokerage and import services 113,967 69,077 54,663 Total revenues 954,002 730,088 584,691 operating expenses Airfreight consolidation 534,699 417,150 334,281 Ocean freight consolidation 128,779 110,603 96,337 Salaries and related costs 153,196 108,797 84,272 Selling and promotion 13,469 10,409 7,545 Rent 10,806 8,279 6,651 Depreciation and amortization 11,159 8,147 6,629 Other 41,979 29,278 22,125 Total operating expenses 894,087 692,663 557,840 Operating income 59,915 37,425 26,851 other income (expense) Interest income 2,096 2,264 1,741 Interest expense (358 ) (163 ) (312 ) Other, net 919 58 119 Other income, net 2,657 2,159 1,548 Earnings before income taxes 62,572 39,584 28,399 Income tax expense 24,161 15,321 11,004 Net earnings $    38,411 24,263 17,395 Basic earnings per share $        1.57 $      1.00 $        . 73 Diluted earnings per share $        1.46 $        .95 $         .69 Basic shares outstanding 24,428,929 24,161,363 23,971,742 Diluted shares outstanding 26,323,522 25,644,296 25,166,156 see accompanying notes to consolidated financial statements