Year	% of relevant age group
1976	96.5549
1977	96.53648
1979	102.19594
1980	97.88506
1981	95.69102
1984	100.36801
1987	99.58052
1988	96.26103
1989	96.41507
1990	96.77577
1991	91.8516
1993	87.42294
2000	96.23823
2001	96.02829
2002	93.67627
2003	90.40989
2004	91.02478
2015	85.63393
2016	87.13671
2017	80.00986
2018	79.2645