Year	% of relevant age group
1971	63.75453
1987	95.38634
1988	99.70924
1989	98.81274
1990	100.67407
1991	105.14822
1992	104.09584
1993	99.38348
1994	94.8822
1995	92.40974
1997	97.66732
1999	98.90566
2000	97.08133
2001	99.47621
2002	99.9042
2003	104.32078
2004	100.75713
2005	98.45772
2006	102.58883
2007	101.15007
2008	99.94751
2009	101.61316
2010	99.86923
2011	101.38132
2012	103.0594
2013	108.81011
2014	103.96821
2015	102.47265
2016	104.26775
2017	104.64126