The data above comes from official State Department tallies tracked by the Migration Policy Institute, a nonpartisan think tank that studies migration issues. The Refugee Act of 1980 mandated that the president set an annual cap on refugee admissions in consultation with Congress. That year the cap was set at over 231,000 refugees.
The annual cap declined sharply since then, peaking again in the mid-1990s as a response to the Balkan wars, according to the Migration Policy Institute. Since 2000, it's hovered primarily in the 70,000 to 80,000 range.
“The United States has historically led the world in terms of refugee resettlement,” according to the Migration Policy Institute. Mass displacement of individuals hit record numbers in 2015 in what the institute calls a "global humanitarian crisis.”
If the proposed cap is put in place in 2018, the United States would be responding to that crisis by allowing the smallest number of refugees to the country in more than 35 years.