ARLINGTON, Va.--(BUSINESS WIRE)--Pay raises for U.S. employees are expected to hold steady in 2016, according to a survey by global professional services company Towers Watson (NASDAQ: TW). The nationwide survey of more than 1,100 U.S. companies also found that employers continue to reward their best performers with significantly larger pay raises as they look for ways to retain top-performing talent in a tightening labor market. The survey, conducted by Towers Watson Data Services, found that