Year	% of relevant age group
1971	85.54958
1972	99.49349
1973	106.6803
1974	93.39744
1975	93.62981
1976	93.03762
1977	89.09674
1978	87.37323
1979	87.80488
1980	83.11746
1981	80.28053
1982	82.42517
1984	75.57152
1985	72.23225
1986	74.06276
1987	69.53524
1988	69.93418
1989	67.46014
1990	62.60314
1992	55.65441
1993	59.42639
1994	58.66612
1995	63.42339
1996	66.71642
1998	103.53417
1999	112.56831
2003	110.34549
2004	102.04797
2005	107.0773
2006	104.79372
2007	109.33764
2008	108.27967
2009	112.30813
2010	106.53595
2011	107.66464
2012	104.67618
2013	99.92746
2014	103.75703
2015	110.96631
2016	108.48773
2017	108.45184
2018	107.90628