8. Staff costs

The following table illustrates the personnel costs for the years 2019, 2018 and 2017.


	Year ended December 31,
	2019		2018		2017
		(Euro, in thousands)
Wages and salaries	€	(116,408)	€	(61,619)	€	(46,677)
Social security costs		(16,858)		(11,003)		(9,081)
Pension costs		(4,715)		(2,994)		(2,175)
Other personnel costs		(39,109)		(27,375)		(16,465)
Total personnel costs	€	(177,090)	€	(102,991)	€	(74,398)

The other personnel costs mainly related to costs for warrants granted of €32.5 million (2018: €21.3 million, 2017: €11.8 million). For the costs of warrants granted, see note 28.