In de PDF below you find the key statistics for the Dutch Muslim communities. These are compiled in cooperation with KASKI institute of the Radboud University Nijmegen and will be updated annually. A more up to date and elaborate version can be found at the Yearbook of Muslims in Europe, published by Brill.
De Koning, Martijn (2020) The changing Islamic landscape in the Netherlands 2020: key statistics. Nijmegen: Radboud University Nijmegen. http://religionresearch.org/closer/interventions/