Year	% of births
2000	18.83905333
2001	18.72546337
2002	18.61585851
2003	18.505374
2004	18.39170154
2005	18.27611542
2006	18.15884912
2007	18.03745634
2008	17.92033119
2009	17.81333479
2010	17.70726151
2011	17.5947751
2012	17.47560586
2013	17.34998433
2014	17.22623995
2015	17.10543012
2016	16.97887882
2017	16.83932758
2018	16.69812424
2019	16.5613094
2020	16.44582801