According to the latest Europol report, there were 1,002 arrests made for terrorist offences in the EU last year.
You will find more statistics at Statista
Of these, Statista's Martin Armstrong notes that 718 were related to jihadist terrorism - making three consecutive years of increases. Nevertheless, the majority of the 142 attacks completed, foiled or failed were related to ethno-nationalism and separatism (99). Of these attacks, 47 were classed as 'completed'.
Terrorism claimed the lives of 142 people in the EU in 2016, with an additional 379 people suffering injuries. Nearly all of these fatalities and most of the casualties occurred as a result of jihadist attacks. The exceptions were six victims of paramilitary violence in Northern Ireland and the murder of the UK Member of Parliament Jo Cox, a year ago this month.