Native Americans in the United States reached the West Coast in the 1770s, smallpox rapidly killed at least 30% of Northwest Coast Native Americans. For the next eighty to one hundred years, smallpox and other diseases devastated native populations in the region. Puget Sound area populations, once estimated as high as 37,000 people, were reduced to only 9,000 survivors by the time settlers arrived en masse in the mid-19th century. Smallpox epidemics in 1780–82 and 1837–38 brought devastation and drastic depopulation among the Plains Indians. By 1832, the federal government established a smallpox vaccination program for Native Americans ("The Indian Vaccination Act of 1832"). It was
Dutch Americans War II, several tens of thousands of Dutch immigrants joined them, mainly moving to California and Washington. In several counties in Michigan and Iowa, Dutch Americans remain the largest ethnic group. Nowadays, most Dutch Americans (27%) live in California, followed by New York, Michigan and Pennsylvania. According to the 2000 United States Census, more than 5 million Americans claim total or partial Dutch heritage. They are particularly concentrated around Grand Rapids, Michigan; Rock Rapids, Iowa; Sioux City, Iowa; Des Moines, Iowa; Fulton, Illinois, Celeryville, Ohio, and Little Chute, Wisconsin. These areas are surrounded with towns and villages that were founded