I have been writing about Drupal core statistics several times in the past, and incrementally, I have been automating the process of extract/sanitize contributors from commit messages and generating visualizations of the contributions.
The code is maintained on one of my drupal.org sandboxes, Drupal contribution analyzer, but I know, specially for the dependencies, that is not really trivial to run.
This time, instead of just presenting a new set of the statistics/visualizations output, I am glad to announce that I will be releasing a new version of the statistics and the visualizations once per week. In that way, the results will be available while I iterate on the code.
The site where the data will be available will be Drupal core contribution statistics website.
If you want to make any suggestion, please do it on the project's issue queue.
Following, one of the images generated, just to provide an idea of what is there.