Given the various pathways that families can take to adopt, precise statistics on just how many transracial adoptions occur each year are difficult to find. However, researchers estimate that around 15% of all adoptions are transracial (Vonk, 2001; Evan, 2009) and, according to the 2000 U.S. Census, 308,000 (18 percent) of the 1.7 million households with adopted children contained members of different races.
Rates of domestic transracial adoption are increasing. In 1995, transracial adoptions represented 11 percent of all domestic adoptions, increasing to 15% in 2001 (see figure below)
International adoptions also account for a large proportion of transracial adoptions in the United States. Rates of international adoption rose steadily, increasing from 15,719 adoptions in 1999 to 22,734 in 2005, but began to taper-off and have declined slightly over the past few years. However, this decline is thought to be due to the U.S. economic recession and not a decline in popularity, as international adoptions are often quite expensive.
[I had an image of the prevalence of international adoption, but it won't load for some reason. I will get it fixed soon]