If you don't mind a little bit of exotic Lua programming...
I´m not totally satisfied with the solution, but I have a working code now. I thought I might as well share it so someone else can make use of it.
I still want "Sannolikhet" to be centered over the four last columns but when I do that I get vertical lines where they are not supposed to be. I also want "Konsekvens" to be vertically ...
pgfplots has various ways of filtering the data, see section 4.22 Skipping Or Changing Coordinates – Filters in the pgfplots manual. In this case you can use restrict x to domain=0:26. It does basically what it says, plotting only the points where x is in the given domain.
Another approach, which lets you use any column in the table for the filter, is to use ...
Here a version using the datatool package instead of csvsimple. Could you plz. check if this works for you as expected?