How many words are there in the Dutch language?

According to the "Dikke van Dale", the most respected Dutch dictionary, there are approximately 240.000 words (translated from http://www.ikhebeenvraag.be/vraag/7996). The director of Dutch institute of Lexicality estimates more then 5 million words are ever used in the Netherlands. The language Databank, a computer that registers all words and word-forms, registered 60 million words - including conjugations of verbs. (translated from http://taalunieversum.org/taal/vragen/antwoord/9/). However the amount of combinations and new words is infinite, and therefore it is difficult (if not impossible) to give a correct estimation.