ANKARA - Votes in favor of Turkish constitutional changes that could give President Tayyip Erdogan sweeping new powers stood at 57 percent with just over half of ballots counted, the state-run Anadolu news agency said on Sunday. Data cited by Anadolu showed a high percentage of 'Yes' votes in central Anatolia, while 'No' votes led in coastal regions near the Aegean Sea and Turkey's mainly Kurdish southeast.