With the MIX11 Conference just around the corner, Microsoft is marking the one year anniversary of the Windows Phone 7 developer's tool set. In reflecting over the past year's events with Windows Phone 7, Brandon Watson has shared some numbers concerning Microsoft's mobile operating system. Here are the highlights.

• The Windows Phone Developer Tools have been downloaded over 1.5 million times. Watson notes that number equals the entire population of Philadelphia.

• There are 36,000 members (registered as developers) of the AppHub (Windows Phone development) Community.  This number is growing at a rate of 1,200 new members a week.

• Numbers of note concerning the Marketplace include that Windows Phone customers average 12 app downloads a month; certification is taking an average of 1.8 days to complete; 44% of all paid apps include a trial version; and 62% of all apps submitted pass certification.

From day one, Microsoft and its critics felt that Windows Phone 7's success was dependent on developer support. The Marketplace currently has a little over 12,200 apps and combined with the numbers Watson has provided, that support appears to be strong.

Source: windowsteamblog