on DMs and the packages they maintain

The notion of Debian Maintainer (DM) has been with Debian for about 3 years. As of now, Debian has approximately 120 DMs, which maintain a significant part of the packages in the archive.

I'm hereby happy to evilly spoil that Enrico Zini has just set up an index of Debian Maintainers and of the packages they maintain. The index is linked from the people section of our website as a symbolic step in giving more credit to DMs.

Now, if anyone would like to setup a nice graph for the statistics page, which monitors the evolution of DMs (and DDs?), that would be useful.
Any idea on how to do that retroactively too?