The table shows industrial and agricultural output in the Russian Empire and the Soviet Union between 1913 and 1928. A 4-column table with 3 rows is shown. Column 1 is not labeled, with entries coal, grain, and iron and steel. Column 2 is labeled 1913, with entries 29, 80, 8.5. Column 3 is labeled 1921, with entries 9, 37.6, 0.3. Column 4 is labeled 1928, with entries 35, 73.3, 7.3. What is the best conclusion that can be drawn from this table?