"Each year, thousands of persons outside their country of origin who fear or face persecution if they return apply for refugee status and come to live in the United States. The number of refugees that may be admitted to the United States is limited by an annual ceiling. This Office of Immigration Statistics Annual Flow Report provides information on the number of persons who filed applications for refugee status, were approved for refugee status, or were admitted to the United States as refugees in 2004 by their country of origin. Country of origin is used in this report to refer to a persons country of nationality or country of previous residence."
U.S. Citizenship and Immigration Services: http://uscis.gov/graphics/index.htm