Agriculture in Papua New Guinea is divided into a large subsistence sector and a smaller monetary sector for export. Agriculture's importance has steadily declined since 1985, when it made up 34% of GDP—in 2001, agriculture only contributed about 30% to GDP. About 85% of the population engages in subsistence agriculture. Subsistence crops include yams, taro, and other staple vegetables. Cash crops are increasing in rural areas, stimulated by government-financed development programs. Production by small farmers of coffee, copra, cocoa, tea, rubber, and oil palm is important for export, although production on plantations, which are usually foreign owned, is also significant. Such plantations are gradually being sold back to nationals. Principal crops and 1999 output (in tons) included sweet potatoes, 460,000; sugar cane, 400,000; copra, 140,000; coffee, 40,000; cocoa, 25,000; and rubber, 7,000. Papua New Guinea grows very little rice, the staple food for many of its inhabitants. A single Australian company imports over 150,000 tons per year to satisfy demand.