Year	% of relevant age group
1971	58.3068313598633
1972	56.7838516235352
1974	57.1934700012207
1975	54.8192405700684
1991	63.6136093139648
1992	63.3437385559082
1999	51.9802207946777
2000	52.8435211181641
2001	48.668758392334
2002	53.4118995666504
2003	51.3887481689453
2004	53.8332595825195
2005	57.596809387207
2008	67.1174011230469
2009	75.3330230712891
2011	71.6308898925781
2012	69.7118377685547
2013	71.6423034667969
2014	68.7672805786133
2015	74.782112121582
2017	71.9263000488281
2018	75.3457336425781
2019	74.6177520751953