Oil in Venezuela is piling up after U.S. President Donald Trump placed sanctions on President Nicolas Maduro’s regime to force Maduro into stepping down, The Wall Street Journal reports.

Oil stockpiles in the South American country have risen to the highest levels in at least five years, reaching 32.8 million barrels of oil last week, research firm Orbital Insight estimates according to WSJ.

The U.S. sanctioned Venezuela’s state-owned oil giant PDVSA Jan. 28, blocking the company from accessing $7 billion worth of assets in the United States. Trump administration officials expect the sanctions to cut Venezuela’s oil exports by $11 billion over the next year.

Orbital Insight estimates the size of oil stockpiles around the world using satellite imagery to compare the stockpiles over time. Since the sanctions dropped, Venezuela’s crude oil reserves have risen by nearly 2 million barrels.

Venezuela has likely had difficulty offloading the extra oil to its next two largest consumers, China and India. Both Asian countries are already well-stocked and their oil supplies have risen by about 5.6 million barrels in India and 18.5 million barrels in China in 2019, WSJ reports.

“It’s actually quite difficult to essentially funnel all those Venezuelan barrels into Asia. Those battlegrounds are fiercely competitive from a market-share perspective,” RBC Capital Markets global energy strategist Michael Tran told WSJ.

Maduro is facing increasing amounts of internal and international pressure to step down after Venezuela opposition leader Juan Guaido proclaimed himself the president on Jan. 23. Venezuela’s military attache to the United Nations is the latest government official to defect from Maduro to Guaido.

Trump and other world leaders recognize Guaido as Venezuela’s rightful leader and are calling on Maduro to step down.

Maduro took over the country after former Venezuelan President Hugo Chavez died of cancer in 2013. Venezuela’s economy began to plummet under Chavez, and Maduro’s regime has overseen worsening food shortages and rampant disease.

Millions of Venezuelans have fled their homes to surrounding countries, causing a humanitarian crisis along Venezuela’s borders as homeless and sick people bring disease and gather by the thousands at shelters.