If the United Kingdom or France joined the United States, they would become the poorest states in the country, with a GDP per capita lower than even Mississippi. Germany would be the second poorest. For most of the second half of the 20th century, Europe and the U.S. rivaled each other in GDP. In 2008, the EU and U.S. had GDPs of $14.2 trillion and $14.8 trillion, respectively. Closing 2023, the EU has seen little growth, with a GDP of around $15 trillion, while the U.S. has marched ahead to a GDP of $27 trillion.