Sharepoint 2010 - Web analytics API

Do you want to customize your Webanalytics report?
then probably you should be using webanalytics API to generate a custom report.

Here is the link on how to use the webanalytics API
 
http://blogs.technet.com/b/sharepointdevelopersupport/archive/2012/07/23/how-to-use-webanalytics-api-frontenddataretriever-querydata.aspx