The United Nations Conference on Trade and Development estimates that roughly 80% of global trade by volume and 70% by value is transported by sea. Of that volume, 60% of maritime trade passes through Asia, with the South China Sea carrying an estimated one-third of global shipping. | The United Nations Conference on Trade and Development estimates that roughly 80% of global trade by volume and 70% by value is transported by sea. Of that volume, 60% of maritime trade passes through Asia, with the South China Sea carrying an estimated one-third of global shipping. |