World Richest--- Mark Zuckerberg makes Forbes top 10 for the first time

                        The 30-year-old social network billionaire had his wealth set at $34.7billion, just over a decade after he launched thefacebook.com from his Harvard dorm room.

                         His huge increase in wealth in the past year - the biggest in the Forbes 400 - netting him a nine-place gain from twentieth in 2013, when his wealth stood at $19billion.

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1   Bill Gates $81.2billion

2   Warren Buffett $68billion

3   Larry Ellison $48.6billion

4   Charles Koch $42.9billion

4   David Koch $42.9billion

6   Christy Walton & family $38.3billion

7   Jim Walton $36.6billion

8   Alice Walton $35.2billion

9   S. Robson Walton $35.2billion

10 Mark Zuckerberg $34.7billion

11 Michael Bloomberg $34.3billion

12 Sheldon Adelson $31.7billion

13 Larry Page $31.7billion

14 Sergey Brin $31.2billion

15 Jeff Bezos $29.9billion

16 Carl Icahn $26billion

17 George Soros $24billion

18 Steve Ballmer $22.3billion

19 Forrest Mars Jr $22.2billion

19 Jacqueline Mars $22.2billion

21 John Mars $22.2billion

22 Len Blavatnik $21.6billion

23 Phil Knight $21.1billion

24 Michael Dell $17.5billion

25 Harold Hamm $17.5billion

26 Paul Allen $17.1billion

27 Charles Ergen $16.9billion

28 Laurene Powell Jobs & family $16.4billione list

29 Anne Cox Chambers $15.8billion

30 Donald Bren $15.3billion

31 Ray Dalio $15.2billion

32 Ronald Perelman $14.4billion

33 Rupert Murdoch & family $13.9billion

34 John Paulson $13.7billion

35 Jack Taylor & family $13.6billion

36 Abigail Johnson $13.3billion

37 James Simons $12.5billion

38 Andrew Beal $11.9billion

39 Patrick Soon-Shiong $11.9billion

40 Philip Anschutz $10.9 billion