What was the estimated percentage of global economic activity accounted for by APEC?

The estimated percentage of global economic activity accounted for by APEC is indeed around 50%. APEC, or the Asia-Pacific Economic Cooperation, is a forum that promotes economic integration and cooperation among its member economies, which include some of the world's largest and fastest-growing economies.

APEC economies encompass around 21 member countries that collectively participate in a significant portion of global trade, investment, and economic growth. The 50% figure reflects the extensive involvement of APEC economies in globalization, facilitating trade between member nations, and their substantial contribution to the world’s GDP. This level of economic activity emphasizes the importance of these economies in shaping international trade and economic policies.

The other figures provided are lower than what is recognized, which does not adequately reflect the substantial economic influence of the APEC region in the context of global economic activity.