The percentage varies from one country to another: 3.5 per cent of an economy the size of China's; 16 per cent of the United States foreign trade; and 35 per cent of Chile's trade.
这一百分比在国与国之间有所不同：在象中国那样大小的经济体中占3.5％，占美国对外贸易的16％，占智利贸易的35％。