If you go on the internet google search
You will find the following
The number of unmarried people in the west is decreasing and the number of kids born before marriage is increasing and in some states in USA I found that the number of the new borns before marriage is 30 %
please visit the sites and see these links

http://www.chicagolandmarriage.org/marriage_statistics.htm

http://blog.worldvillage.com/family/10_shocking_statistics_about_childre...

In USA the pragnancy out marriage is high so that there are continuous efforts to reduce it please see the link

http://www.professorshouse.com/family/children/pregnancy-before-marriage...