Technically Aker "only" achieved it 3 times. Brisbane's midfield was stacked enough that he could spend a little more time forward (or even the backline!) some years. The Bulldogs needed him forward more.Its kinda sad that another thread that starting well about players who have achieved a cool (but ultimately fairly meaningless) statistical mark has turned into the same stupid s**t fight. You could delete 90% of this thread and it would be a massive improvement.
Of his "non 20/1" seasons he had:
-19.9 + 1.8
-19.6 + 1.8
-19.5 + 0.7
-18.6 + 1.1
-18.3 + 2.3
-18.1 + 1.1
-17.2 + 2.0
-15.7 + 1.0
-15.6 + 1.5
-14.7 + 1.2
Coupled with his impressive assist numbers and the lower disposal averages of players in a bunch of these seasons, I'd say most of these are as impressive (or close) as a strict 20/1.