Washington, Jan. 29 (CNA) Taiwan remained on the United States Department of the Treasury's "Monitoring List" of trade partners whose currency practices "merit close attention," according to its semiannual report released Thursday. All of the economies on the list except for Singapore met both the trade surplus and current account surplus criteria, according to the report. However, its net purchases of foreign exchange in the reporting period, totaling US$5.9 billion, represented only 0.7 percent of GDP. On foreign exchange intervention, the Treasury said Taiwan's central bank made small net purchases of foreign currency during the period, mostly in May amid heightened market volatility. Despite this, the Taiwan dollar appreciated 11.2 percent against the U.S. dollar during the report period before partially retreating in the following months, the Treasury said.