Year	SmokeWhilePregnant
1990	19.2
1991	18.7
1992	17.9
1993	16.8
1994	16.0
1995	15.4
1996	15.3
1997	14.9
1998	14.8
1999	14.1
2000	14.0
2001	13.8
2002	13.3
2003	12.7
2004	10.9
2005	10.1
2006	10.0
2007	10.4
2008	9.7
2009	9.3
2010	9.2
2011	9.0