This site does exactly what I’ve been waiting for someone to do for ages and provide and interactive chart that’s constantly updated rather than just pumping out a jpeg image every month or so. I’ve put up an image here of the chart as taken 4th May just because, but I highly recommend visiting the site instead.
Chart via Neregate (site nsfw). Click for full size.
Chart via Neregate. Click for full size
Chart via AnimuCharts. Click for full size