Graphs wanted for Homepage and Vcs-XXX field stats

I've recently set up a couple of stats page for some fields usage in Debian packages: one for the Homepage field, one for the Vcs-XXX fields.

As Raphael observes, those stats need percentage and graphs, and even Lucas asked me about that back in Extremadura, also providing a sample gnuplot script. These days my time is quite lacking, and I'm also missing the time to put its sample script to work :-(

So I've made available the source code which is generating the two stats above (see the "source code ... is available" notice at the bottom of the pages). Patches are welcome for generating percentages and graphs, thanks in advance :-)

Update: thanks to Lucas, now the stats page above sport graphs \o/ Update: changed URLs to point to the new stat page locations