For thE yEAr shown，othEr thAn 1987，in whiCh thE pErCEnt rEturn on shArEholDErs’Equity For mAnuFACturEr x wAs most nEArly EquAl to thAt For 1987，whAt wAs thE pErCEnt rEturn For All unitED stAtEs mAnuFACturErs