United States Gross Income, Net Profits, Production, and price index in the Lumber Industry 1920 1934; Year Gross Income (In Millions Dollar) Net Profit (In Millions Dollar) Production (In Board feet) (In Millions) Wholesale Price Index (1926=100) 1920 3,312 N/A 35,000 N/A 1922 2,402 167 35,250 N/A 1924 2,835 132 39,500 1926 3,069 117 39,750