Microsoft has provided new statistics for its Windows Phone developer story.

Brandon Watson, Director of Developer Experience for Windows Phone, penned a blog post on Thursday to provide an update and overview of Microsoft’s Windows Phone developer statistics. Microsoft unveiled its tools and platform for Windows Phone 7 developers a year ago at MIX10. A year has now passed and Microsoft is touting some pretty impressive statistics for its Marketplace and developer ecosystem.

Here’s a round-up of the latest stats:

• 1.5 million downloads of the Windows Phone Developer Tools
• 36,000 Windows Phone developers
• 11,500 Windows Phone 7 applications
• 7.500 paid Windows Phone 7 applications
• 1,200 newly registered Windows Phone developers each week
• 1,100 apps generating developer revenue using Microsoft’s Advertising Ad Control
• 12 apps downloaded on average per customer each month
• 1.8 days is the average certification time for apps
• 62% of alls apps pass certification on their first attempt
• 44% of all paid apps include a trial version
• 40% of registered developers have published an application

“The stats don’t lie” is the famous phrase and it’s fitting in Microsoft’s case. Windows Phone 7 launched on October 26 with 1,000 applications available. Five months later and the platform has increased over 10 fold. Microsoft appears to be building up a good momentum amongst application developers. The software giant added 3,000 applications in March alone after reaching its 10,000 milestone earlier this month.

Despite delays with its first platform update, “NoDo”, developers have a lot to look forward to this year. Microsoft’s new Nokia partnership is a great opportunity for new and existing developers as more and more consumers take advantage of Windows Phone. Nokia said recently that it plans to ship Windows Phone branded devices to developers when they are avaialble later this year. Nokia is currently engineering Windows Phone devices and is expected to wait for “Mango”, the next version of Windows Phone, until it unveils them later this year. “Mango”, the codename for what will likely be named Windows Phone 7.5, is currently in the early beta stages at Microsoft. The software giant revealed a number of new features in February that will ship as part of its Windows Phone point release later this year. Nokia is reportedly waiting for multitasking, IE9 mobile and others before it releases its first Windows Phone device.

Microsoft will also detail further developer related improvements to Windows Phone 7 during its MIX11 event in April next month. Joe Belfiore, who oversees Windows Phone Program Management, and is responsible for the design and software product definition of forthcoming generations of Windows phones will keynote MIX again. Belfiore will also be joined by Scott Guthrie, who heads Microsoft’s .NET Developer Platform. Guthrie runs the development teams responsible for delivering Silverlight, Visual Studio and the .NET Framework technologies for building client and Web applications. Belfiore is expected to further detail Microsoft’s “Mango” update and other developer improvements.

Microsoft has also promised further developer related platform announcements during May. WinRumors understands that the company plans to share a future roadmap for Windows Phone a special developers day on May 25 in London. Microsoft is describing the event as a peek at the future and what lies ahead for Windows Phone. “As well as new capabilities, we’ll examine any changes to the tools and SDK and explore what opportunities these might create,” says Microsoft. “At this stage we’re unable to elaborate any further but expect it to be a day packed-full of inspiring information.”