The United States of America is being the top country by GDP in the world. As of 2015, GDP in the United States of America was 15,083,356 million volume, at constant 2005 prices - US dollars that accounts for 24.88 % of the world's GDP. The top 5 countries (others are China, Japan, Germany, and the United Kingdom) account for 52.75 % of it. The world's total GDP was estimated at 60,621,004 million volume, at constant 2005 prices - US dollars in 2015.
Expenditure-based gross domestic product is total final expenditure at purchasers’ prices (including final consumption expenditure, gross fixed capital formation, changes in inventories, valuables and f.o.b. value of exports of goods and services), less the f.o.b. value of imports of goods and services.