In this Friday, March 3, 2017 photo, Agne, 12, plays his trumpet as he practices in the centre of The Hague, The Netherlands. Of the Netherlands' 17 million people, just over one in five now have a migrant background _ rising to roughly half-and-half in the Netherlands' four largest melting-pot cities: Amsterdam, Rotterdam, Utrecht and The Hague. (AP Photo/Emilio Morenatti)