Year	% of children under 5
1990	37.2
1991	35.8
1992	34.5
1993	33.4
1994	32.3
1995	31.2
1996	30.1
1997	29.1
1998	28.2
1999	27.7
2000	27.3
2001	27
2002	26.9
2003	27
2004	27.1
2005	27.4
2006	27.5
2007	27.5
2008	27.6
2009	27.8
2010	28
2011	28.5
2012	28.9
2013	29.3
2014	30
2015	30.7
2016	31.5