Year	% of relevant age group
1999	35.300121307373
2000	35.5696487426758
2001	36.4606895446777
2002	38.4505310058594
2003	40.109260559082
2004	40.4086990356445
2005	40.9074783325195
2006	42.4972686767578
2007	43.914249420166
2008	45.2146301269531
2009	45.9694290161133
2010	46.7758407592773
2011	47.1911506652832
2012	48.1111488342285
2013	48.7517890930176
2014	48.9087982177734
2015	49.3465385437012
2016	50.0290985107422
2017	49.8432998657227
2018	50.271240234375
2019	50.6026191711426
2020	50.4771995544434