Year	% of births
2000	18.34448654
2001	18.18802139
2002	18.0336154
2003	17.85731981
2004	17.6780848
2005	17.48333749
2006	17.27392339
2007	17.07065012
2008	16.86886605
2009	16.68051288
2010	16.49318401
2011	16.3052143
2012	16.12308919
2013	15.94713046
2014	15.7773536
2015	15.60177759
2016	15.43034817
2017	15.2525994
2018	15.07694033
2019	14.92063382
2020	14.76651824