Year	% of births
2000	19.40701452
2001	19.39505585
2002	19.3884295
2003	19.37815373
2004	19.37211223
2005	19.35551805
2006	19.34513549
2007	19.32559144
2008	19.31038617
2009	19.28577602
2010	19.25527046
2011	19.20902242
2012	19.12436808
2013	19.0161338
2014	18.89289015
2015	18.76376178
2016	18.64470903
2017	18.53292228
2018	18.43593712
2019	18.35391593
2020	18.28976148