Year	% of children ages 12-23 months
1980	6.854300076870105
1981	11.208520621939801
1982	13.111612627019491
1983	16.037354409505312
1984	23.016609953808675
1985	31.391310814543186
1986	39.56357604914345
1987	44.055861760432684
1988	49.849050617479406
1989	54.880797023611194
1990	55.35862359796503
1991	53.346084735593244
1992	50.37014215305482
1993	50.122596731783325
1994	52.21603781711585
1995	53.4769554741865
1996	51.29468651845482
1997	50.9770656857896
1998	49.836630817163524
1999	48.92309229846978
2000	51.621445045279884
2001	52.886184159414604
2002	54.04984115179668
2003	56.867379816642554
2004	59.4388946180875
2005	60.87065413462209
2006	62.95371688964228
2007	64.39083452719268
2008	67.30373147776514
2009	71.23402604541523
2010	70.74556997986188
2011	68.75955441279714
2012	68.98956611986
2013	68.48113765468275
2014	68.13118007464597
2015	67.23722717255967
2016	67.73801354697827
2017	69.5107568083441
2018	70.63833023460778
2019	70.97872728035243
2020	69.55857382273017
2021	67.90195025018474
2022	68.69857600200963