I've been playing since 17/02/13 and level 93 - did have a couple of years off where I did nothing, but never tanked before, although I did make sure I finished 11th last season as was running 10th all season even after trying so was trying to avoid a few of the top teams.
Got all the promoted teams again this year (as per previous thread) so that didn't work.
Current league has teams at: 175%, 183.3, 176, 168.8, 147.9, 166.3, 163, 152.9, 145.8, 150.2, 141.2, 141.4 and 148.7. I am currently at 147.7, so one of the weaker teams on paper.