India Ranks 15th With 175,000 Millionaire Households In 2013: Report

The number of millionaire households in Japan fell from 1.5 million to 1.2 million, driven by the 15 per cent fall in the yen against the dollar.

"As the debate over the global polarization of wealth rages on, one thing is certain: more people are becoming wealthy," the report said.

As in previous years, North America at $50.3 trillion and Western Europe at $37.9 trillion remained the wealthiest regions in the world, followed closely by Asia-Pacific at $37 trillion.

A key driver in the rise of private wealth in the Asia- Pacific region has been strong GDP growth over the past five years, especially in China,  India, and Indonesia, the report said.

Globally, the amount of wealth held privately rose by $19.3 trillion in 2013, nearly twice the increase of $10.7 trillion seen in 2012.

The growth of private wealth was driven primarily by returns on existing assets.

The highest density of millionaire households was in Qatar (175 out of every 1,000 households), followed by Switzerland (127) and Singapore (100).

The U.S. had the largest number of billionaires, but the highest density of billionaire households was in Hong Kong (15.3 per million), followed by Switzerland (8.5 per million).

At an expected growth of 9.1 percent over the next five years, UHNW households are projected to hold 13 trillion dollars in wealth by the end of 2018.