Factbox: Russia's oil and gas revenue windfall
Russia's sales of oil and natural gas far exceeded initial forecasts for 2021 as a result of skyrocketing prices, accounting for 36% of the country's total budget.
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### Instruction: Factbox: Russia's oil and gas revenue windfall

### Response: Russia's sales of oil and natural gas far exceeded initial forecasts for 2021 as a result of skyrocketing prices, accounting for 36% of the country's total budget.