Goskomtsen established prices for all imports and some exports. Protectionist policies were enacted that limited imports and favored exports. Jamaica imports and exports many goods through their waters. The excess of exports over imports was . Shanghai accounted for half of the imports and exports of China. A tariff is a tax on imports or exports between sovereign states. Three quarters of the imports and exports are with the U.S. American imports and exports both went into a tailspin. Exports were encouraged, reversing Rhee's policy of reliance on imports. In 2017 Ukraine imported 14.5% of all its imports from Russia. That's because tariffs are taxes on imports. Kenya currently imports all crude petroleum requirements. India imports around 6000 commodities from 140 countries. Estonia imports petroleum products from western Europe and Russia. The country relies on Russia for various imports, including petroleum.