Year	% of births
2000	20.02741798
2001	20.00854009
2002	20.00851132
2003	19.98362292
2004	19.93470746
2005	19.85947711
2006	19.7688229
2007	19.69024134
2008	19.63163842
2009	19.60388726
2010	19.57581736
2011	19.54340185
2012	19.49897996
2013	19.43649089
2014	19.35283154
2015	19.25947245
2016	19.15460803
2017	19.04332611
2018	18.92827309
2019	18.81887394
2020	18.71212047