NL is undercounting by 30 to 40% in the official figures. Eventually this gets fixed due to excess death figures being far more accurate but those don't make it into the various COVID statistics reports. So you'll hear one official institution in NL reporting a cumulative tally of about 22600 at the moment, and another reporting 35000 or thereabouts.

(good article about this in Dutch https://www.ntvg.nl/artikelen/covid-19-oversterfte-de-maat )