"Since Microsoft entered the market, Google has nearly doubled its share at both companies' expense, but for the last year or so Bing has gained a few fractions of a point every month -- at least in the U.S.

Worldwide, Google still dominates with between 80% and 90% share, depending on who's measuring."

Not to pick on the result, but BusinessInsider is a poor choice as a reference. At least they point to results from Experian.