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In page Economy of Papua New Guinea:

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Other sources include renewable resources, such as forests, marine resources (including a large portion of the world's major tuna stocks), and in some parts agriculture. Agriculture, for subsistence and cash crops, provides a livelihood for 85% of the population and continues to provide some 30% of GDP. Oil palm production has grown steadily over recent years (largely from estates and with extensive outgrower output), with palm oil now the main agricultural export. Coffee remains the major export crop (produced largely in the Highlands provinces); followed by cocoa and coconut oil/copra from the coastal areas, each largely produced by smallholders; tea, produced on estates; and rubber.[citation needed]