Why did the immigrant population in the United States greatly increase from 1900 to 19 10?

During this period, U.S. President theodore roosevelt stepped up anti-monopoly efforts and actively implemented them? Sherman antitrust law? , hit many monopoly business giants, including Standard Oil Company, initiated the American government's intervention in the economy, created fair and free trade, effectively reduced the exploitation of workers by capitalists and improved their living standards, so he himself became one of the most successful presidents in American history.