Explanation: The people working on farms started go down since people continued to work in places like factories. The people not working on farms was about 60% and that is when the shift started based on the chart.
The chart on page 328 of your AMSCO book shows you the change from almost a 50/50 split in 1900 to a 32/68 split by 1910, proving majority by the year 1910.
