The Dayton metropolitan area exported more than $4 billion in products and services last year, according to a new Brookings Institution report. The Dayton area ranks 80th among 381 U.S. metropolitan markets in terms of exports and collectively supports local 26,126 jobs. From 2013 to 2014, the value of its exports grew 1 percent. The biggest sector for Dayton-area exports are aircraft products and parts, which represent $529 million in sales. That industry has been one of the targets for local…