We known to Top 10 biggest rich man in the world now.That isTop 10 biggest rich man in the world 2000 TO 2019 list.Each year, Forbes employs a team of over 50 reporters from a variety of countries to track the activity of the world's wealthiest individuals and sometimes groups or families - who share wealth. Preliminary surveys are sent to those who may qualify for the list. According to Forbes, they received three types of responses – some people try to inflate their wealth, others cooperate but leave out details, and some refuse to answer any questions. Business deals are then scrutinized and estimates of valuable assets – land, homes, vehicles, artwork, etc. – are made. Interviews are conducted to vet the figures and improve the estimate of an individual's holdings. Finally, positions in a publicly traded stock are priced to market on a date roughly a month before publication. Privately held companies are priced by the prevailing price-to-sales or price-to-earnings ratios. Known debt is subtracted from assets to get a final estimate of an individual's estimated worth in United States dollars. Since stock prices.
fluctuate rapidly, an individual's true wealth and ranking at the time of publication may vary from their situation when the list was compiled.

The rankings are published annually , so the net worths listed are snapshots taken at that time. These lists only show the top 10 wealthiest billionaires for each year.
Source: Wikipedia,
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