Cigarette Smoking During Pregnancy, by Maternal Age and Birth Certificate Type,^* 2007

Cigarette Smoking During Pregnancy, by Maternal Age and Birth Certificate Type, 2007
Maternal Age	Percent of Mothers
Maternal Age	Unrevised Birth Certificate	Revised Birth Certificate
^*The 1989 Standard Certificate of Live Birth (unrevised) was used in 26 reporting areas including New York City and Washington, DC; the 2003 revised birth certificate was used in 22 reporting areas.↑ Source II.19: Centers for Disease Control and Prevention, National Center for Health Statistics, National Vital Statistics System
Under 20 Years	12.4	14.0
20-29 Years	11.5	12.9
30-39 Years	5.3	538
40-54 Years	5.6	5.5

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