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2016-11-4 · 4.4.1.3 Air transport 69. 4.4.2 Telecommunications 70. ... Zambia's ratio of trade in goods and services to GDP (82% in 2014) suggests that trade is important to its economy. Copper continues to be by far the top export earner (accounting for over 70% of the value of merchandise exports). ... although a proposal has been made to charge for this ...
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