I recall when Baltimore hit that tipping point (may have been the first city to do so), and I bet it was well over 10 years ago...it may have been over 15. I think the larger driver is that abortion is casually being used as a form of birth control. No one is pushing women to get pregnant so they can kill the baby (although there certainly is pressure at that point.) There's lots of adult failure that precedes the pregnancy. This is perhaps the most perverted example of a society that has been sold on having unlimited "rights" and zero responsibility.