From 1901 to 1910, a record 8,202,388 people immigrated to usa,that is a little bit more than 8 million.In this period mainly European people immigrated from Europe to USA for employment,freedom,religion point of view.So this era could be considered European Settlement in the Americas.
And from 2001 to 2010,about 14 million people immigrated to USA.During this phase,USA changed from colonial to an agricultural economy and manufacturing economy.