Each bundle that is available for purchase has a section at the bottom that shows you the statistics of the bundle. This information is provided as a neat little trivia factoid into each bundle.
This section is just raw numbers broken down into their separate categories, which are constantly updated.
Those who have paid the most money for the bundle will show up on the leaderboard for all to see! If your pledged amount breaks that top 10, a new box will appear, prompting you to enter in how you would like to be known. For more information about the Top Contributors, please visit this article here.