Once the U.S. was a manufacturing powerhouse, but much of its industry has now moved overseas or south of the border to low-cost countries such as China, India, and Mexico. About eighty percent of the U.S. economy is now serviced based. But, despite the loss of manufacturing jobs, the U.S. still has the world’s largest gross domestic product (GDP) at about $18.5 trillion. That is nearly 70% larger than China’s GDP at $11.4 trillion, over four times larger than Japan’s at $4.7 trillion, and over five times larger than Germany’s at $3.5 trillion.