Venezuela depends on oil for 90 percent of its export receipts and 50 percent of its tax revenues.
These goods provide 30% of the export receipts of the manufacturing sector.
Windfall revenues from export receipts normally were used to reduce foreign debt and dependence on foreign aid.
Cotton accounts for 40 percent of GDP and roughly 80 percent of official export receipts.
He added, "Even with an overvalued currency, some Hungarian companies have been cashing some good export receipts in the past two years."
Under a forward contract the export receipt of $ 10m is worth DM39.3m ($10m x DM3.93).
Coffee has declined in importance with depressed world prices, accounting for just 5 percent of export receipts in 2005.
As with almost half of developing countries, more than 50 per cent of Chile's export receipts were from a single primary commodity.
Cotton accounts for 40% of GDP and roughly 80% of official export receipts.
In Bahrain, petroleum production and refining account for about 60% of export receipts.