XF 1.5 Build stats off of old data?


I'm wondering if there is any way or if someone has built an ad-on to take existing forum data from an imported forum and backfill the statistics. What I mean is, my forum is 10 years old. But I migrated to Xenforo in February 2017. If I go into stats, nothing goes back beyond the import date. But everyone's join data and all the post and thread dates is in the database. It would be nice to see what my weekly post count is compared to 5 years ago. The data of how many posts were made in April of 2012 exists. Its in the database because every post has a date stamp. How can I backfill all of my forum stats?