According to Solow's estimate, out of the average annual economic growth rate of 2.9% for the U.S. from 1909 to 1949 , how much was attributable to the accumulation of capital? Multiple Choice 0.12% 0.32% 075% 1.22% 1 cec According to Solow's estimate, out of the average annual economic growth rate of 2.9% for the U.S. from 1909 to 1949 , how much was attributable to the accumulation of capital? Multiple Choice 0.12% 0.32% 0.75% 1.22% 1.55%.