However, department officials said they have been working closely with numerous countries to strengthen international adoption procedures, and they suggested the numbers could rise if the US adoption community helped to address some of those countries' concerns about ethics and oversight.
The department's report for the 2016 fiscal year, released yesterday, shows 5,372 adoptions from abroad, down from 5,648 in 2015 and more than 76 per cent below the high of 22,884 in 2004. The number has fallen every year since then.
Congo was second on the list with 359 adoptions. Many of those were adoptions that had been delayed for several years during a suspension - now lifted - that the Congo government imposed out of concerns over adoption fraud.
Ukraine was third on the list with 303 adoptions, followed by South Korea, Bulgaria, India, Uganda, Ethiopia, Haiti and the Philippines.
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As adoptions from various countries have declined in recent years, adoption advocates - and the State Department - have cited Africa as an area where adoptions may increase.
For a second straight year, there were no adoptions from Russia, which once accounted for hundreds of US adoptions each year, but imposed a ban that fully took effect in 2014. The ban served as retaliation for a US law targeting alleged Russian human-rights violators.
The last time there were fewer foreign adoptions to the US overall was in 1981, when, according to US immigration figures, there were 4,868 adoptions from abroad.
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