Sources of children and adoptive parents
The most common countries for international adoption by parents in the United States for 2007 were China (5453), Guatemala (4728), Russia (2310), Ethiopia (1255), South Korea (939), Vietnam (828) Ukraine (606), Kazakhstan (540), India (416) Liberia (353), Colombia (310), and Philippines (265).(U.S. State Department) Other less common countries include Bulgaria, Norway, Australia, Kenya, Canada, Haiti, and Poland. These statistics can vary from year to year as each country alters its rules; Romania, Belarus and Cambodia were also important until government crackdowns on adoptions to weed out abuse in the system cut off the flow. Vietnam recently signed a treaty openings its doors for adoption.[citation needed]