But which separator is it, and which line ending? ASCII, UTF-8, UTF-16 or something else? What about quoting separators and line endings? Yes, there is an RFC, but a million programs were made before the RFC and won’t change their ways now.
Also you can gzip CSV and still stream them.
I don’t know, but for Germany that seems way too high. Maybe I just don’t see all the indoor cats in the cities (where more than 75% of the people live).