Year	% of children ages 12-23 months
1980	20.94510629104835
1981	23.168667932549802
1982	28.018961392685295
1983	31.995240793518064
1984	41.21591821518063
1985	57.44178938503943
1986	63.284910358804915
1987	66.9924917896191
1988	72.58369506964287
1989	79.81322739211761
1990	80.89090036822863
1991	74.63207582413763
1992	75.16334328970866
1993	75.93599054570834
1994	74.03694721762251
1995	76.85267815236574
1996	78.51008298581817
1997	76.93251343468978
1998	79.16945242463277
1999	81.70386384006417
2000	83.31138458753531
2001	84.3966779878028
2002	82.34004905222598
2003	82.62406263812028
2004	83.4841079978292
2005	84.22831346026476
2006	83.52678634279549
2007	84.98413138929827
2008	85.87435938203633
2009	86.75694093655085
2010	87.60442054777754
2011	87.38416048944384
2012	83.89157202275261
2013	85.55493475065059
2014	85.28067438883416
2015	84.27935507576717
2016	85.17216811673913
2017	86.25760984125624
2018	85.91658890169985
2019	86.18094062817896
2020	82.96268837016731
2021	82.57827311144189
2022	84.19782897955616