And what year did primary economics activities make up the largest share of the US economy?

Primary economic activities, such as agriculture, mining, forestry, and fishing, have gradually declined in their share of the overall US economy over time due to the rise of other sectors like manufacturing and services. However, it is important to note that primary economic activities still play a significant role in certain regions and rural areas of the country.

While there isn't a specific year where primary economic activities made up the largest share of the US economy, they held a greater portion in the past when the nation was primarily agrarian. During the 19th century, when agriculture was the dominant economic sector, primary activities accounted for a substantial portion of the US economy. However, as the country progressed and industrialization took hold, the relative importance of primary activities declined.

By the mid-20th century, manufacturing and services became the primary pillars of the US economy. Today, primary activities only represent a small fraction of the nation's overall economic output.