MIAMI ( – If you’ve driven past the mansions on Miami Beach or in Coral Gables, the phrase the rich keep getting richer may not be a surprise.

According to a new report from the Credit Suisse Research Institute, the millionaires in the world now control 38.5 percent of global household wealth.

The percentage grew from 35.6 percent in 2010. The overall global wealth was pegged at $231 trillion, according to Credit Suisse.

As the middle class and lower class struggle to put food on the table, Credit Suisse found that the millionaires in the world saw their wealth grow by $20 trillion dollars in the last year.

The study also found that in June 2011, there were 84,700 ultra high net worth individuals, which was defined as having net assets exceeding $50 million.

The overall numbers have rapidly increased in recent years and the U.S. claimed the title for the greatest number of richest citizens, with 35,400.

Credit Suisse found that in terms of average wealth per adult, the U.S. isn’t in the top 3. According to the study, Switzerland, Australia, and Norway are the three richest nations in the world.

  • Click here to read more from Credit Suisse.