This is hourly/etc. though?

The one I posted was the yearly average which I think is a much better way to look at this (maybe monthly would be better though).

> < 20 p/ug

~ 20 seems quite high (IMHO)

> so almost no one uses coal or wood here

Power plants might be the much bigger issue. Coal is still > 60%, of course it has improved massively over the last few years (used to be almost 80% a few years ago). IIRC Poland produces more electricity from coal than all the other EU countries combined besides Germany (who also suck).