It looks to me like the 2020 data file is simply malformed. There are no separators that I can see in many of the lines. I do see some commas in some rows, but those might be decimal marks rather than column separators. Fixing the import with code is probably not practical. Can you get a clean version of the data?
Well on of the Tasks in this paper is to Format and manipulate the data in files to get the values you need..
To get a clean data-file might need a while if ever, cause it's from the government. But yeah, I might send a request.
I found another Kind of workaround, since this file exists as an xls-file too.
So i just saved the xls as a csv and it looks ugly, but I should get the needed values out of it.
Not sure what the corrector will say to this, but since the original csv-file is malformed it could be a valid excuse...