In its 2012 report released this week, Small Arms Survey found that legal global trade in small arms has grown to at least $8.5 billion a year. If the illicit trade were added, it would come to more than $10 billion, the weapons research group said Monday. The Small Arms Survey had estimated the global trade in small arms, munitions and spare parts at more than $4 billion four years ago. The countries that export more than $100 million of small arms were the United States, Italy, Germany, Brazil, Austria, Japan, Switzerland, Russia, France, South Korea, Belgium and Spain.