Under the 1965 Immigration Act, which category of immigrants allows for the largest number of immigrants to enter the United States on a yearly basis?

Immigration from non-European countries increased dramatically. The act removed de facto discrimination against Southern and Eastern Europeans, Asians, and other non-Northwestern European ethnic groups from American immigration policy. The highest number of immigrants (4.3 million) to the U.S. came from Mexico, in addition to some 1.4 million from the Philippines. Korea, the Dominican Republic, India, Cuba and Vietnam were also leading sources of immigrants, each sending between 700,000 and 800,000 over this period.