By John S. McClenahen Boeing Co. Chairman and CEO Philip M. Condit did quit. But apparently many other CEOs have been thinking about it. Indeed, 73% of CEOs have recently considered quitting, a 35% increase from the 54% of CEOs who in 2000 said they had entertained the idea, indicate data from Burson-Marsteller, a public relations and communications consulting firm. Its data show also that 35% of senior executives would turn down an offer to be CEO today. "Although considerably lower than one year ago (54%) when corporate scandals rocked the worldwide business community, the reluctance to assume the chief executive office is still higher than it was two years ago (27%) when Enron had yet to become a household name," says Burson-Marsteller. Its 2003 study of 1,040 CEOs, executives, financial analysts, institutional investors, business media, government officials and board members has a margin of error of plus or minus 3% and was conducted with RoperASW.