The single largest sub-sector remains industry, whose share of overall output has shrunk to 18.1% in 2013. The mix of industrial output has changed significantly since 2010 when the city announced that 140 highly-polluting, energy and water resource intensive enterprises would be relocated from the city in five years. The relocation of Capital Steel to neighboring Hebei province had begun in 2005. In 2013, output of automobiles, aerospace products, semiconductors, pharmaceuticals, and food processing all increased.