"The year 1820 is the first year for which detailed immigration statistics for the United States are available, thanks to the Steerage Act of the previous year. During 1820, 8,385 immigrants arrived in the United States. Most, 43 percent, came from Ireland. The second-largest group, 29 percent, came from Great Britain. Hence, almost three-quarters of all immigrants who arrived in the United States during that year came from the British Isles alone. The next-largest groups came from the German states, France, and Canada. During the 1820’s, French immigrants moved ahead of Germans as the second-largest group after people from the British Isles. The second half of that decade also saw a steep rise in overall immigration, with the numbers of arrivals rising from slightly fewer than 8,000 in 1824 to more than 22,500 in 1829. People from Ireland, who already constituted the greatest single immigrant group during the 1820’s, were drawn to the United States by both continuing poverty in their original homeland and the growing demand for labor in America. For example, New York State’s Erie Canal, which was under construction from 1818 to 1825, drew heavily on immigrant Irish labor. That project began a long history of Irish immigrant labor helping to build the American transportation infrastructure. The rapid commercial success of the Erie Canal stimulated the building of more canals in other parts of the country, increasing the need for immigrant labor."