More than one million refugees and migrants arrived in the European Union in 2015, while almost 3,700 died or went missing in perilous journeys which reaped huge profit for smugglers, according to the International Organisation for Migration. "This is three to four times as many migrants and refugees coming north as we had in 2014, and the deaths have far surpassed the deaths last year," IOM chief William Lacy Swing told Reuters. Out of a total of 1,005,504 arrivals to Greece, Bulgaria, Italy, Spain, Malta and Cyprus by 21 December 2015, the vast majority – 816,752 – arrived by sea in Greece, IOM said.