Inspired by @brainblasted I ran a bit of script-fu on my jhbuild checkout, and found out two things:
1. I have commits in a bunch of projects that I completely forgot about
2. over the years I added 1.2mil lines of code to GNOME (and related) projects, and removed about 900k lines, which means I'm about 300k lines in debt
I aim to be code contribution neutral by 2050.