Year	% of births
2000	18.176250470691
2001	18.239168061153716
2002	18.198114293376012
2003	18.11648494886112
2004	17.937611716112148
2005	17.686612299753346
2006	17.515391368189125
2007	17.312419378144874
2008	17.121684064144652
2009	17.00315138366188
2010	16.834942123634182
2011	16.398416637122416
2012	15.997894692713427
2013	16.085264811408
2014	15.686576982233849
2015	15.858076522234127
2016	15.476812255298057
2017	15.446393749838252
2018	15.64393204742567
2019	15.566063688235252
2020	15.800150397352057