International adoption peaked in 2004: That year, Americans brought 23,000 children from foreign countries into their families. But in the decade since, there's been a remarkable decline. Last year, 5000 kids from other nations were adopted, which is a slide of 70 percent. Theories abound on why this sudden, dramatic drop-off occurred, but researchers say one thing is clear: Many Americans still want to adopt internationally, and they're frustrated that it's become far more difficult.