While a median of only 14% say Note: Median percentage for \"leading economic power\" based on 35 countries surveyed in both 2014 and 2015 has already replaced the U.S. as the top superpower, majorities or pluralities in 27 of 40 countries say Note: Median percentage for \"leading economic power\" based on 35 countries surveyed in both 2014 and 2015 will eventually become or has already replaced the U.S. as the top superpower.