According to the census of 1910, in a total population of almost 92 million, 15 percent had been born outside of the United States. In the years prior to World War I, refugees fleeing the Austro-Hungarian Empire, the Russian Revolution, and anti-Semetic pogroms changed the demographics of the immigrant population as more people from Eastern and Southern Europe arrived on American shores. Census data from the early twentieth century shows the shift in immigration in the first two decades of the twentieth century.
