Every year Forbes magazine comes out with a list of the world's richest people. It's usually the same group of people, but this year it's changed up a little bit.

For the past 13 years, Bill Gates has held the number one spot, but this year he was knocked from his throne to number three on the list by investor Warren Buffett with an estimated worth of $68 billion. Buffett saw a $10 billion increase in his net worth over the past year, while Gates had a $1 billion increase. In all, however, Gates is only worth $58 billion, more than a few billion shy of Buffet. In third place is Carlos Slim Helu, a Mexican telecom mogul worth $60 billion.

Mark Zuckerberg, the founder of the popular social networking site Facebook, has something new to boast about as well - he's the youngest self-made billionaire to make Forbes annual list of the world's richest people. While his $1.5 billion ranked him at just #785 out of a record 1,125 billionaires globally, it didn't even rank him in the top 20 amongst Silicon Valley billionaires.

Here are some other interesting bits of trivia with regards to this year's list:

• 101 Californias made the international list, and were worth more than $317 billion in total net worth.
• 1/5 of the California billions was controlled by three key figures in Silicon Valley: Larry Ellison, founder of Oracle (worth $25 billion); and Google co-founders Sergey Brin and Larry Page, each worth $19 billion.
• 27 of the Cali billionaires live or work in Silicon Valley, worth $123 billion altogether.
• Meg Whitman (former eBay CEO) is the only woman in Silicon Valley to make the list, ranking #897 in the world with $1.3 billion.
• The world's richest woman was Liliane Bettencourt of France, ranked #17 in the world with $22.9 billion.
• US billionaries were outnumbered by foreign billionaires 469 to 656.
• American billionaires were worth $1.6 trillion, while foreign billionaires were wroth $2.8 trillion.
• While the U.S. has the most billionaires, Russian came in second with 87 billionaries, beating out Germany.