Year	% of women ages 15-49
1990	42
1991	40.5
1992	39.1
1993	37.7
1994	36.4
1995	35.2
1996	34
1997	32.9
1998	31.9
1999	31
2000	30.3
2001	29.7
2002	29.4
2003	29.1
2004	28.8
2005	28.6
2006	28.3
2007	27.9
2008	27.6
2009	27.3
2010	27.1
2011	27.1
2012	27.3
2013	27.6
2014	28
2015	28.6
2016	29.4