InicioGfK THE NETHERLANDS, May 2015. GfK poll 31.5.15 Area: The Netherlands Sample size: 2230 Sampling error: ±2.1% Method: Online Fieldwork date: 22-26 May. 2015 Pollster: GfK Client: EenVandaag-AvroTros Source | Parties Etiquetas GfK Netherlands Facebook Twitter