The Port of Singapore is the collection of facilities and terminals that conduct maritime trade and handle Singapore's harbours and shipping. It has been ranked as the top maritime capital of the world, since 2015. Currently the world's second-busiest port in terms of total shipping tonnage, it also transships a fifth of the world's shipping containers, half of the world's annual supply of crude oil, and is the world's busiest transshipment port. It was also the busiest port in terms of total cargo tonnage handled until 2010, when it was surpassed by the Port of Shanghai.