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