Survey on the Labour Insertion of University Graduates Affiliation to Social Security and contribution base of the university graduates from the 2009-2010 academic year. Absolute figures Quintile lower limits (in euros) of the contribution bases (March each year) Unidades: euros ;2011;2012;2013;2014; Segundo quintil;604,8;729,2;764,19;774,83; Tercer quintil;1.115;1.190,09;1.233,75;1.310,24; Cuarto quintil;1.583,33;1.686,28;1.725,05;1.773,75; Quinto quintil;2.195,86;2.274,95;2.331,17;2.368,04; Notas: Fuente: Instituto Nacional de Estadística