Year	% of relevant age group
1972	77.06491
1973	76.99708
1974	84.76489
1975	87.19373
1976	89.44032
1977	91.20302
1978	95.55876
1979	97.49367
1980	100.1342
1981	102.6541
1982	103.09
1983	99.72431
1984	96.75512
1985	95.42702
1986	93.2113
1987	91.48986
1988	92.80353
1989	91.02544
1990	89.9205
1991	88.2506
1992	87.97741
1993	90.00698
1994	90.62743
1995	94.04513
1996	95.39855
1997	101.9827
1998	98.65637
1999	98.2796
2000	102.075
2001	107.4085
2002	110.1135
2003	110.3328
2004	112.2736
2005	116.1676
2006	114.9993
2007	117.3579
2008	119.614
2009	116.1169
2010	114.6975
2011	118.4109
2012	117.2367
2013	117.6931
2014	119.1416
2015	119.2331
2016	119.1558
2017	119.0671
2018	117.7001