How can I delete old Jetpack Site Stats?

I created a new baseball website. To create the site, I basically just duplicated my football site and changed/modified the theme.

Being that I simply copied a site, all of the JetPack Site Stats reference the old football site stats. So, top posts, top seaches, total views, busiest, etc. all refer to the football traffic. How can I delete these old stats, everything prior to March 26, 2012?

I should note that the old site used the WordPress.com Site Stats plugin, but I updated to Jetpack after copying to the new site. I don’t know if this makes a difference, but figured I should mention it.

Also, encrypted_search_terms shows in the dashboard widget for “Top Searches”. I imagine this is from the old search and traffic results.

Thanks.