Year	% of relevant age group
1971	50.68568
1972	51.13043
1973	51.59099
1974	52.44594
1975	57.53071
1976	60.53173
1977	60.71401
1978	64.90196
1979	63.67308
1980	66.3767
1981	67.82951
1982	68.65183
1983	67.44362
1984	66.59688
1985	66.99307
1986	67.49427
1987	67.42552
1988	65.85215
1989	66.21064
1990	64.39471
1991	63.09628
1992	64.0055
1993	64.81695
1994	65.79748
1995	71.13752
1996	72.95669
1997	84.04547
1998	81.21153
1999	79.00127
2000	87.00205
2001	92.48629
2002	97.36182
2003	98.8766
2004	102.0892
2005	107.3906
2006	107.4041
2007	110.9078
2008	117.8426
2009	114.0419
2010	113.1641
2011	115.7137
2012	115.9804
2013	117.6708
2014	119.2046
2015	117.9867
2016	118.6214
2017	117.7323
2018	116.4222