In previous years, the criminal organizations gradually expanded to Overijssel and Gelderland, but in the past year more use was made of locations in the West (North and South Holland) and the North (Friesland, Groningen, Drenthe) of the country. Drug labs where synthetic drugs were made were mainly discovered in North Brabant (21), Gelderland (11), North Holland (10) and Limburg (10).
