Final answer:
The specific percentage of world trade financed through countertrade transactions is not given, but the importance and growth of international trade are significant, with trade comprising a large portion of many countries' GDP.
Step-by-step explanation:
The percentage of the total world trade that is financed through countertrade transactions is not explicitly provided in the resources available from the World Bank or the World Trade Organization. However, these resources show the significance of global trade in the world economy.
For instance, as per the World Bank data, trade has become an increasingly important component of many countries' economies, with some countries like Botswana having up to 97% of their economic activity connected to trade. Furthermore, historical trends indicate that exports have grown from 7% of global GDP in 1827 to approximately 24% of GDP by 2014. While the specifics of countertrade transactions may not be detailed in these resources, they highlight the overall importance and evolution of trade policies and international trade connections.