Bing rings 70% search rise for Microsoft sites.
The global search market grew a sizeable 46 percent between December 2008 and December 2009, from 89.7 billion to 131.4 billion searches conducted by people age 15 or older from home and work locations. These searches include the top properties where search activity is observed, not only the core search engines. Google of course took first place, but Microsoft managed to see the biggest percentage change, at least when looking at the top five search properties.
Source - Bing rings 70% search rise for Microsoft sites