Canadian exports of crude oil by rail are bouncing back after falling to an eight-year low over the summer, according to the Canada Energy Regulator.

The National Energy Board says crude-by-rail exports in January fell compared with December, but remained more than twice as high as 12 months earlier.

Slowing growth in global oil exports, low crude prices and weak demand for non-oil commodities were identified as factors.

Oil exports in the United States have hit a 15-year high, and most is getting shipped north of the border, to Canada, according to recent data from the U.S. Energy Information Administration.