India is in seventh place with $2 trillion, and Italy in eighth with an economy of over $1.8 trillion. Ninth place goes to Brazil, with an almost $1.8 trillion economy. And in 10th is Canada, with an economy of over $1.5 trillion.

The economy of the United States is larger than the combined economies of numbers three to 10 on the list.

 The world's biggest economies

Fastest-growing economy

The US may not dominate for much longer, however. Although China trails the US by $7 trillion, it’s catching up. China’s economy grew by 6.7% in 2016, compared with America’s 1.6%, according to the IMF.

China has also overtaken India as the fastest-growing large economy. The IMF’s World Economic Outlook estimated China’s economy grew at 6.7% in 2016, compared with India’s 6.6%.

Brazil’s economy has contracted in the last year by 3.5%, the only one in the top 10 to do so.

Europe comes third with just over one-fifth of global GDP (21.37%).

Together, these three blocs generate more than four-fifths (83.16%) of the world’s total output.

The biggest economies in 2050

A new study by PricewaterhouseCooper says that China will be in first place by 2050, because emerging economies will continue to grow faster than advanced ones.

India will rank second, the US will be third, and fourth place is expected to go to Indonesia.

The UK could be down to 10th place by 2050, while France could be out of the top 10 and Italy out of the top 20 as they are overtaken by faster-growing emerging economies such as Mexico, Turkey and Vietnam.

The report also says that the world economy could more than double in size by 2050, far outstripping population growth, due to technology-driven productivity