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Peak Year: 1100 BCE (33.7%)

Nadir: 1974 (2.8%)

Agriculture came to the Ganges plain early, but as the rest of the world caught up, India’s relative importance declined. The industrial revolution came late to British India and the main part of the population remained in subsistence agriculture until the 21st century. The socialist economics brought stagnation to India, but eventually economic reforms were introduced.