“More than three-fourths of metropolitan Boston residents took in a performing arts event in 2002, according to the results of a new national survey to be released today at City Hall. In fact, more Greater Bostonians attend performing arts events (78 percent) than professional sports events (56 percent) each year, according to a report by the Performing Arts Research Coalition.” And in Boston, home of some of the country’s most rabid sports fans, that’s saying something.