According to www.myheritage.es, the 1910 federal census effected on April 15th, 1910 determined that the residents of the US were 92´228.496 and increase of 21 percent over the 1900 census, while in year 2010 even the population was over 308 million, only had a 9 percent over the 2000 census.
This data show us finally the biggest effect of immigration in the United states took place in the beginning of the twentieth century.