Here are the Thais on the Forbes list, by ranking and net worth.
Joining Gates on top is the investor and philanthropist, Warren Buffet, with a fortune worth $75.6 billion, up from $60.8 billion past year.
"I understand why some Americans watch their tax dollars going overseas and wonder why we're not spending them at home", wrote Gates, whose $86 billion net worth is roughly 25 times larger than Trump's $3.5 billion fortune. According to the index, her wealth has climbed by $US6.2 billion ($8 billion) over the previous year.
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Amancio Ortega: Ortega co-founded the hugely successful high street Spanish retail chain Zara, and now boasts a net worth of $74 billion.
According to its methodology, Forbes bases its billionaires list on a "snapshot of wealth" taken on February 17 by valuing assets using stock prices and global exchange rates.
Microsoft founder Bill Gates again tops Forbes' list of the world's richest people, in a year when the number of billionaires rose 13% to 2,043.
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China was second with 319 billionaires, and Germany was third with 114. Gates has a fortune of $86 billion, up from $75 billion previous year.
The traditional bronze place went to Amazon's Jeff Bezo, who accumulated an additional $27.6bn to his fortune since a year ago when he was ranked as the fifth richest person in the world. Jeff Bezos, who founded Amazon, and Facebook creator, Mark Zuckerberg, are No. 3 and 5, respectively. Also new to the list is Japan's first self-made woman billionaire, Yoshiko Shinohara, who started a part-time staffing firm from her one-bedroom Tokyo apartment to help women get into the workforce.
The US had the most billionaires with 565, a product of the swelling value of the American stock market since Trump's November 2016 election. The total combined net worth of this year's billionaires is $7.67 trillion, up from $6.48 trillion last year. The only other woman in the top 20 was Alice Walton, only daughter of Wal-Mart Stores founder Sam Walton. The list is dominated by United States billionaires. Bezos, 53, has topped additional Forbes' lists, including its Most Powerful People (No.14 in 2016) and its Richest in Tech list (No.2 in 2016).
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