China's economic growth in 2015 is slowest in 25 Years China's growth rate slowed to an annual rate of 6.8 percent in the fourth quarter of 2015, down from 7:3 percent in 2014, Source: The Wall Street Journal, January 19. 2016 China's growth rate has slowed from 7.3 porcunt a year in 2014 and if it remains at 6.8 percent a year, how many additional years will it take for China's real GOP to double? Whon real GDP per person grows at 7 3 percent a your, real GDP per person in China doubles in years