Interestingly in 1995, the year during which we later in time retrospectively found out that Clinton began a wrongful sexual relation -- that is a year when the graph shows the decline in abortions suddenly flatten for a while (going from a significant rate of decline before 1995 to near flat in 1995), and then after 1995 the decline resumes, but at a slower rate than pre 1995. (and, a more rapid rate of decline finally returned/resumed again during Obama's term.)
This is why I began to think the influence of how a President acts -- his demeanor /behavior -- appears to have some effect. Mind, we know for sure it's not the only factor.
(also, if you wish to discuss 2018 in actual detail, I'd be happy to, but expect we need a new thread or another thread)