Reuters/Carlos Garcia Rawlins

Colombia exported 477,000 barrels per day to the US in February.

Venezuela exported 472,000 barrels per day to the US, falling more than 10%.

Venezuela has typically outpaced Colombia in volume of US crude exports.

As operations at Venezuela's state-run oil company PDVSA fall apart, the country is losing key market share.

Venezuela fell behind Colombia in volume of oil exports to the US - one of its biggest markets - in February, according to the US Energy Information Administration. This is the first time on record that Venezuela has trailed Colombia in oil exports to the US, data going back to 1993 showed.

Colombia exported 477,000 barrels per day to the US in the second month of 2018, the EIA said. The number of Venezuelan shipments to the US dropped 10.6% that month to an average of 472,000 barrels per day.

Venezuela has been siphoning funds from its oil industry as the country struggles to pay debts. On top of that, it's struggling to keep workers on the job - thousands of PDVSA employees began fleeing the company after it fell under military control.

The most recent dropoff puts Colombia in fifth place among top oil suppliers to the US, a spot Venezuela previously held. Venezuela has historically outpaced Colombia in crude output to the US. In October 2017, the US imported more than double the number of barrels from Venezuela than from Colombia.

Output fell to a new long-term low of 1.5 million barrels per day in April, according to a Reuters survey. Analysts at Bank of America Merill Lynch expect the country's crude oil output to continue to slide, ending the year at 1.1 million barrels per day.

US Energy Information Administration

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