Year % of relevant age group 1972 30.685920715332 1973 29.8850593566895 1974 29.8447895050049 1975 28.4377498626709 1976 27.6116600036621 1999 29.8400001525879 2000 34.6213989257812 2001 34.0288391113281 2005 37.1454811096191 2006 40.8344306945801 2008 46.5852699279785 2011 43.0817909240723 2013 43.9013900756836 2014 51.2632904052734 2015 55.4163093566895 2016 56.3898696899414 2017 51.8677291870117 2018 54.5015411376953 2019 54.8281402587891 2020 52.7001914978027 2021 57.6875114440918 2022 59.5425300598145