Year	% of births
2000	13.31707698
2001	13.39761699
2002	13.47218521
2003	13.52676068
2004	13.56896108
2005	13.59994338
2006	13.62300878
2007	13.65567276
2008	13.66890976
2009	13.68783337
2010	13.6980107
2011	13.6877931
2012	13.67966157
2013	13.66197584
2014	13.62705175
2015	13.58763753
2016	13.55913054
2017	13.5466434
2018	13.52385539
2019	13.52843155
2020	13.52511019