UPDATE 2-Brazil hikes interest rates fifth time, no sign of stopping

* Central bank raises benchmark rate to 9.5 pct from 9 pct * Economists see more tightening due to unchanged statement By Luciana Otoni and Bruno Federowski BRASILIA/SAO PAULO, Oct 9 (Reuters) - Brazil raised interest rates for the fifth straight time on Wednesday and gave no indication of backing off its battle with high inflation even as Latin America's largest economy struggles to pick up speed. The central bank raised its benchmark Selic interest rate to 9.5 percent from 9