That graph doesn't really tell the true story of the title.
I remember two distinct periods in the last 10 years where both Cena and HHH practically had the belts glued to them, yes maybe they dropped it at a pay-per-view, but then they won it right back. Both times I got put of wrestling completely as it was guaranteed the HHH would pull out the sledgehammer (No not steph's face) and get DQ'd. THe night he had Jericho's win overturned I nearly put my fist through the TV. Cena was superman for two years going over everyone cleaner than Mister Sparkle.
This run has been completely different as in its unpredictability and the way there have been no squashes.
I don't see anyone in the roster that can make anyone in the title hunt look as good as Punk does.