The actual vote percentages? What do you mean? Do you mean this?
So 16.6 percent for the "hard" left at least, 21.2 if you count the Green Left... Is this unprecedented? The road of excess leads to the palace of wisdom - William Blake
Unprecedented? I think it is. Look at the historic overview chart (wikipedia), here. SP and GroenLinks never bumped above 15%, let alone 20%.
This is why I wrote that the polarisation is far from gone...