We process an enormous amount of data each day. We're constantly working to prevent spam and invalid shares from being counted. We’re also working hard to provide our users with new and more accurate views of their sharing data, and generally increase the performance of our analytics systems. When we update these systems or add new features, we re-process large amounts of data. As a by-product of this processing, you may see a small amount of fluctuation (typically less than 1% per data point) with respect to previous reports for the same data.