Year	% of births
2000	15.80318546
2001	15.77820436
2002	15.74756879
2003	15.71697625
2004	15.67465276
2005	15.61324612
2006	15.54435939
2007	15.45486489
2008	15.34748982
2009	15.23091984
2010	15.10839751
2011	14.98559055
2012	14.88470305
2013	14.79265996
2014	14.72653646
2015	14.67139497
2016	14.61791717
2017	14.55987708
2018	14.50085243
2019	14.45498341
2020	14.41585206