81.   About a quarter of government revenue comes from the sale of petroleum products.

82.   The remaining revenue would come from taxes and non-oil exports.

83.   The revenue came from blockbuster drugs such as the ulcer medication Zantac, it said.

84.   The expected revenue will come from the sale of crude oil as well as petroleum products, he said without providing a breakdown.

85.   The increased revenues will come from changes in tax accounting rules and greater rigor in tax collections.