Year % of relevant age group 1973 12.9655704498291 1990 16.6469097137451 1992 21.1712799072266 1996 15.7297601699829 1997 15.94993019104 2000 16.2915096282959 2001 15.9247398376465 2002 17.0584506988525 2003 22.8941402435303 2004 20.8597507476807 2005 22.7732200622559 2006 26.1364498138428 2007 35.6300315856934 2008 29.6872005462646 2009 30.8614902496338 2010 33.9216499328613 2011 36.0940818786621 2012 36.882568359375 2013 38.4820594787598 2014 41.7612380981445 2015 38.9864387512207 2019 33.4833984375 2021 37.2764701843262 2022 34.5331687927246