Year	% of births
2000	19.14346291
2001	18.99349989
2002	18.86989319
2003	18.7250702
2004	18.46695244
2005	18.06301799
2006	17.66773251
2007	17.29715427
2008	16.99179943
2009	16.83365679
2010	16.73304054
2011	16.72359463
2012	16.83707608
2013	17.03017558
2014	17.32257806
2015	17.67608466
2016	17.97977869
2017	18.16875712
2018	18.24868963
2019	18.23934098
2020	18.21201819