Year	% of relevant age group
1981	56.2626113891602
1986	60.939998626709
1987	49.0169486999512
1992	41.5102500915527
1993	36.6788291931152
1994	44.4880599975586
1999	46.6943283081055
2002	54.7611503601074
2003	53.1874008178711
2004	56.9672393798828
2007	59.1752510070801
2008	67.9907989501953
2013	73.9174423217773
2014	79.4605712890625
2017	81.409049987793