Employment by economic sector, United States, 1840 to 2015 Number of people employed by economic sector. 140 million 120 million 100 million 80 million 60 million 40 million 20 million 0 1840 1860 1880 1900 1920 1940 1960 1980 2015 Source: Our World in Date based on Herrendorf et al. (2014) Our World in Data People employed in services People employed in manufacturing People employed in agriculture CC BY Discuss the pattern of employment by sector for the U.S. as shown in the chart by Our World in Data. Include what factors contribute to the current distribution of employment in the U.S. (https://ourworldindata.org/grapher/employment-by-