United Nations Conference on Trade and Development: https://unctad.org/system/files/official-document/rmt2021_en_0.pdf

The Review of Maritime Transport has been published annually since 1968. The flagship report provides an analysis of structural and cyclical changes affecting seaborne trade, ports and shipping, as well as an extensive collection of statistics.

Around 80% of the volume of international trade in goods is carried by sea, and the percentage is even higher for most developing countries.

https://unctad.org/topic/transport-and-trade-logistics/review-of-maritime-transport

Transport policy and legislation

https://unctad.org/topic/transport-and-trade-logistics/policy-and-legislation