Answer: Science
The Enlightenment is the name of a period of European history, roughly beginning in the 17th or 18th century. One of the most significant events in this period was the scientific revolution.
The scientific revolution was a series of events that marked the beginning of modern science. This time period saw the development of the scientific method and the categorization of different sciences, along with more specialized methods of addressing each one of these branches. It also brought a general trust in science and reason as methods to arrive to answers, and to guide society into modernity.
Japanese 98.1%, Chinese 0.5%, Korean 0.4%, other 1% (includes Filipino, Vietnamese, and Brazilian) (2016 est.)
The answer is Mathematics
The spread and development of industry in the United States, as well as areas of favorable climate were factors responsible to change population patterns in America.
Specially during the late years of the 19th century and the World Wars, the need for workers grew significantly with a growth in production and industrial development, and that's attracted many people (that moved from countryside regions and settlements to major cities). Favorable climate conditions has attracted farmers and businesses for generations; with a constant growth in demand for supplies, raw materials and food, areas with good climate conditions are seen as opportunities for profit.
That's why these 2 factors (industry and climate) are responsible for the changes that occurred in the population patterns in the US.