Whilst Google has (according to ComScore) a share of 60 % of all seach queries in US, worldwide 67 % and in Germany over 80 %. Only in Japan Yahoo is anywhere close to Google with 43 %

more at Adage.com
Addendum: The Numbers
- Turkey 93%
- Brazil 89%
- Italy 88%
- Canada 82%
- Germany 82%
- UK 79%
- France 77%
- USA 60%
- Japan 56%
- Korea 12%
What is going on inside USA. This No-Fun Alley Insider Chart shows

... MicroHoo / Bingahoo going down hand-in-hand
Addendum:
Advertising Age
Henry Blodget Does the Math on the Revenue Side of the Deal