Year	% of women ages 15-49
1990	44.6
1991	43.1
1992	41.6
1993	40.2
1994	38.8
1995	37.6
1996	36.4
1997	35.3
1998	34.3
1999	33.4
2000	32.7
2001	32.1
2002	31.7
2003	31.4
2004	31.1
2005	30.8
2006	30.4
2007	30
2008	29.5
2009	29.1
2010	28.9
2011	28.9
2012	29
2013	29.2
2014	29.6
2015	30.1
2016	30.9