Year	% of relevant age group
1970	13.7031202316284
1971	13.7046604156494
1972	14.0595798492432
1973	14.2844104766846
1974	14.4549198150635
1975	14.5776100158691
1976	14.6660995483398
1977	14.8387203216553
1978	14.9389095306396
1979	15.0834302902222
1980	15.2285404205322
1981	15.3864698410034
1982	15.5003995895386
1983	15.5540504455566
1984	15.6118602752686
1985	15.699390411377
1986	16.0018692016602
1987	15.9538097381592
1988	16.0616207122803
1989	16.1947002410889
1990	16.767749786377
1991	17.502950668335
1992	17.7669200897217
1993	17.8980503082275
1994	18.0007495880127
1995	18.1367607116699
1996	18.1947402954102
1997	18.5125293731689
1998	18.705150604248
1999	19.0250091552734
2000	19.6421298980713
2001	20.3393898010254
2002	22.8876209259033
2003	25.3050594329834
2004	26.2839393615723
2005	27.4403991699219
2006	28.6346607208252
2007	29.9903907775879
2008	31.662670135498
2009	33.236141204834
2010	34.5267486572266
2011	35.3817291259766
2012	36.1275787353516
2013	36.5135383605957
2014	36.5145416259766
2015	37.9533882141113
2016	38.6548614501953
2017	39.3501091003418
2018	40.2813491821289
2019	40.4211502075195
2020	40.7707710266113
2021	41.0231285095215
2022	40.719409942627