Year	% of relevant age group
1971	14.313289642334
1972	13.5744800567627
1973	14.9051103591919
1974	14.6755695343018
1999	30.8485202789307
2000	34.1927795410156
2001	36.8320808410645
2002	37.6110916137695
2003	34.5778617858887
2004	43.7172203063965
2005	41.1768684387207
2006	41.7037391662598
2007	39.2080383300781
2009	44.6708717346191
2010	43.7535514831543
2014	51.5591011047363
2016	55.7205810546875
2017	62.8769302368164
2018	67.6049499511719