The Emergency Quota Law of 19 May 1921 was designed to limit the immigration of aliens into the United States. Based on data from the 1910 US Census, the Act established a quota limit of 3 % of the number of people belonging to a specific nationality. Since the Anglo-Saxon population in the US was by far the largest, immigrants from England, Scotland, Ireland and Wales were more likely to get in than Hungarians, Russians, Italians or Greeks. Population movements from Eastern and Southern Europe were restricted, and generous quota were allotted to Great Britain, Germany and Scandinavia. In 1922, 25.153 immigrants from the UK were admitted compared to 5,756 Hungarians. The total number of new immigrants fell from 805,228 in 1920 to 309,556 in 1922.
Tibor Frank, Double Exile. Migrations of Jewish-Hungarian Professionals...(2009) 171-172