Year	% of women ages 15-49
1990	30.2
1991	29
1992	28
1993	27.1
1994	26.3
1995	25.7
1996	25.1
1997	24.5
1998	24.1
1999	23.6
2000	23.2
2001	22.9
2002	22.6
2003	22.3
2004	22.1
2005	21.8
2006	21.5
2007	21.1
2008	20.7
2009	20.2
2010	19.8
2011	19.6
2012	19.5
2013	19.5
2014	19.7
2015	20.1
2016	20.6