According to one recent estimate, there are over 900,000 Americans seeking to adopt at any given time. Each year, American families adopt approximately 50,000 children out of foster care, 18,000 via domestic infant adoption, and 10,000 children via intercountry adoption. Together, these totals represent 93% fewer completed adoptions than individuals actively seeking to adopt.
Source: Adoption Advocate No. 57: Reconsidering Intercountry Adoption: Who wants to Adopt and Who Could Be Adopted? Published March 2013 by Christopher Balding. Read more.