Year	% of relevant age group
1997	106.9936
1998	104.8541
1999	107.5295
2000	107.5203
2001	104.3646
2002	102.2443
2003	105.3625
2004	106.5515
2005	108.4766
2006	108.9722
2007	104.7684
2008	104.8668
2009	101.5097
2010	104.0577
2011	100.4256
2012	104.5196
2013	102.3351
2014	102.0653
2015	101.6282
2016	102.4402
2017	100.1225
2018	99.99876