"Typically, the annual number of refugees that can be admitted into the United States, known as the refugee ceiling, and the allocation of these numbers by region are set by the President after consultation with Congress at the start of each fiscal year. For FY2018, the worldwide refugee ceiling is 45,000. The FY2018 regional allocations are, as follows: Africa (19,000), East Asia (5,000), Europe and Central Asia (2,000), Latin America/Caribbean (1,500), and Near East/South Asia (17,500). Refugee admissions in FY2017 totaled 53,716. On October 24, 2017, a 120-day suspension of the refugee admissions program put in place by President Donald Trump expired. The same day, President Trump issued an executive order that provided for the resumption of the refugee program subject to certain conditions. The executive order referenced 'special measures' that would be applied to refugees whose entry poses potential threats to the United States."
CRS Report for Congress, RL31269
Federation of American Scientists: http://www.fas.org/sgp/crs/index.html