ZURICH (Reuters) - Zurich Insurance announced a dividend increase on Thursday following a 24 percent jump in annual profit, and said that would set a floor for future payouts. Logo of Zurich insurance is seen at an office building in Zurich, Switzerland August 9, 2018. REUTERS/Arnd Wiegmann Europe’s fifth-largest insurance company said its cost savings plan was on track and business operating profit (BOP) rose 20 percent last year to $4.6 billion (3.6 billion pounds), driven by underlying...