Forbes magazine announced its annual list of the world's richest people on Monday, which included a record number of women.

Wal-Mart Stores Inc heiress Christy Walton was the highest-ranking woman, in ninth place, at $36.7 billion, Forbes said in announcing the list. France's Liliane Bettencourt, who got much of her wealth from cosmetics company L'Oreal SA, was next among women at $34.5 billion, and ranked 11th overall.

Roughly two-thirds of the world's billionaires, or 1,080, were self-made. The United States had the most billionaires, with 492, followed by China at 152 and Russia at 111. Algeria, Lithuania, Tanzania and Uganda joined the list with one each.

No 1: Christy Walton 

Net Worth: $36.7 billion

Source Of Wealth: Wal-Mart

Wal-Mart Stores Inc heiress Christy Walton is the highest-ranking woman, in ninth place, at $36.7 billion. [Photo/Xinhua]

Walton is the richest woman in the world once again, taking back the title from L'Oreal Heiress Liliane Bettencourt. She has now held that title for 4 out of the last 5 years.

Related: Forbes: Top 10 richest people in the world