From 1992 to 2011, the total trade volume between the U.S. and China increased by 25 times, and China's share in U ….S. total imports increased from 5% to 20%. However, the U.S.'s share in China's total imports dropped from 11% to 8% in the … same period. In the major categories of U.S. exports to China, waste & scrap increased from 744 million dollars in 2000 to …