Canada’s energy exports to the US jumped at the end of last year, pushing the country’s trade surplus with its biggest customer to the highest in more than two years.

The surge in crude oil shipments is likely driven by a combination of higher prices, a weaker Canadian dollar and traders trying to front-run President Donald Trump’s threatened tariffs on goods the US buys from Canada. After talks between Trump and Prime Minister Justin Trudeau on Monday, both countries agreed to delay any tariffs by a month.

With Canada’s trade imbalance with the US driven entirely by oil exports, the country’s surplus with the US widened in December, while its deficit with other trading partners grew. The jump in oil exports also helped Canada post an overall trade surplus for the first time in 10 months.

In December, Canada’s trade balance swung to a surplus of C$708 million ($496 million), from a $986 million deficit in November, Statistics Canada said Wednesday. Economists in a Bloomberg survey were expecting a C$1 billion surplus in the final month of the year.

Canada’s energy exports to the US jumped at the end of last year, pushing the country’s trade surplus with its biggest customer to the highest in more than two years.

The surge in crude oil shipments is likely driven by a combination of higher prices, a weaker Canadian dollar and traders trying to front-run President Donald Trump’s threatened tariffs on goods the US buys from Canada. After talks between Trump and Prime Minister Justin Trudeau on Monday, both countries agreed to delay any tariffs by a month.

With Canada’s trade imbalance with the US driven entirely by oil exports, the country’s surplus with the US widened in December, while its deficit with other trading partners grew. The jump in oil exports also helped Canada post an overall trade surplus for the first time in 10 months.

In December, Canada’s trade balance swung to a surplus of C$708 million ($496 million), from a $986 million deficit in November, Statistics Canada said Wednesday. Economists in a Bloomberg survey were expecting a C$1 billion surplus in the final month of the year.