Final answer:
The United States has historically held the largest share of world GDP, peaking at 32.74%, with the percentage declining since. Other countries like Germany, China, Brazil, Mexico, Chad, and Saudi Arabia contribute to varying extents based on factors like economic size and growth. Accurate, current figures require the latest economic reports.
Step-by-step explanation:
Understanding the percentage of world nominal GDP that each country represents requires examining the latest economic data. However, based on historical context, it is known that the United States once peaked at 32.74% of global GDP in 1985. While this percentage has declined, the US still holds a significant portion of the world's GDP. The European Union (EU), as a collective, also contributes a major part of the world GDP, though this is distributed among its member states.
Countries like Germany and China are major economies, with China particularly growing rapidly and influencing global GDP figures. Nations like Brazil and Mexico represent sizable economies within Latin America, fitting into the mid-tier per capita GDP category. By contrast, Chad falls into a much lower income category, with a proportionally smaller share of the world GDP.
Saudi Arabia's economy, significantly driven by oil exports, places it in a different economic bracket compared to countries with a diversified economic base. Still, it is an important player in global GDP figures, especially within the Middle East.
It's important to note that these percentages are dynamic and subject to change based on economic growth, inflation, exchange rates, and other macroeconomic factors. For up-to-date figures, one would need to refer to the latest reports from global financial institutions such as the International Monetary Fund (IMF) or the World Bank.