Year % of relevant age group 1970 27.5054607391357 1971 29.8388595581055 1972 31.2655296325684 1973 32.536449432373 1974 35.3521308898926 1975 36.870548248291 1984 46.6945991516113 1985 47.2865409851074 1986 48.5033302307129 1987 49.2806510925293 1988 50.3629493713379 1989 51.4451217651367 1990 52.032169342041 1991 52.6817398071289 1992 53.6627998352051 1993 54.1361999511719 1994 55.2059211730957 1995 56.2658081054688 1996 57.4351692199707 1997 58.7864303588867 1998 59.6866912841797 1999 60.2643013000488 2000 61.235221862793 2001 62.2002792358398 2002 63.9532012939453 2003 64.9235763549805 2004 66.1313629150391 2005 67.9626617431641 2006 68.6294937133789 2007 69.5254821777344 2008 70.6042175292969 2009 71.4666213989258 2010 72.2829666137695 2011 72.2448120117188 2012 71.5925521850586 2013 71.7779006958008 2014 71.5540008544922 2015 73.610237121582 2016 75.0356826782227 2017 75.0270462036133 2018 74.1922225952148 2019 74.4746704101562 2020 74.7162399291992 2021 75.7861785888672 2022 75.8670425415039