Nigeria’s struggles to pump to its OPEC+ quota over the past year have resulted in a loss of $1.31 billion gross revenue for the biggest African oil producer, according to data calculated by Business Insider Africa. The cumulative underproduction for Nigeria between January 2025 and January 2026 is estimated at about 18.12 million barrels. Multiplied by the official average price of the country’s flagship Bonny Light crude, $72.08 per barrel, the lost revenues for OPEC’s top African producer amount to $1.31 billion, Business…