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The best place to be a super-rich woman?

Four – that's the number of women that made this year's Forbes list of the world's 30 richest people. But although that small number might not come as a surprise, where they live could well do.

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South America leads the way when it comes to female representation – the percentage of the country's billionaires that are women – and on a country level, Angola comes top, according to analysis of the Forbes Rich List by business services company, Approved Index.

That's because of a technicality: Angola has only one billionaire living in the country, Isabel dos Santos – she's an investor and is the daughter of Angola's president, Jose Eduardo dos Santos. She has a net worth of $3.3 billion.

Chile, with four female billionaires, comes second and Peru, with two, comes third. A third of each country's super-rich citizens are women.

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Asia is at the other end of the spectrum -- of its 610 billionaires, just 42 are women. On a country level, Taiwan lingers at the bottom of the list, with 33 male billionaires but no super-rich women. Indonesia and Singapore also both have high number of billionaires (23 and 19 respectively), none of which are female.

In fact, out of the 70 countries where billionaires live, over half have no super-rich women, including Norway and Ireland, Approved Index found.

American billionaires

As the world's biggest economy, it's perhaps little surprise that the U.S. has the highest number of female billionaires – 67 -- in the world. But that figure pales in comparison to the total number of 536 billionaires who live in the States.

The U.K. has 53 billionaires according to Forbes, only two of which are women, while out of the 88 Russian billionaires, just one is female - Russian businesswoman, Elena Baturina.

Trilby Rajna, editor at Approved Index, told CNBC that while the male-to-female ratios in South America were encouraging, the overall data accentuated some wide-spread gender issues.

"It is inspiring to see how well some South American countries such as Chile, Peru and Brazil are represented for female billionaires. On the other hand It is saddening to see the meager representation in countries like the U.K. and Canada, especially as we expect gender equality -- an issue which frequently makes headlines -- to be of greater priority," she said.

"The fact that many females on the list of the wealthiest individuals in the world have inherited their fortune rather than self-made it points to larger gender issues."

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She added that encouraging girls from a young age to think like entrepreneurs was "hugely important" in both tackling gender inequalities and growing individual economies.

Approved Index used the Forbes 2015 list of 1,826 billionaires around the world for its analysis.

RONALDO SCHEMIDT | AFP | Getty Images