This graph shows the gross domestic product (GDP) manufactured in the United States from 1800 to 1900. A graph titled U S G D P Per Capita shows years labeled 1800 to 1900 on the horizontal axis and dollar amounts on the vertical axis. A line increases from $1000 in 1800 to $3000 in 1860, is constant from #3000 in 1860 to $3000 in 1880, and increases to $5000 in 1900. According to the graph, the manufacturing of products in the United States greatly increased from 1800 to 1900. greatly decreased from the onset of the Civil War to 1900. slowly decreased in 1800 and again in 1900. slowly increased after 1880.