It's not you, it's increased reporting of crime and news media.
With sex crime against older kids there's another driving factor; the raise in the age-of-consent
Not to put too fine a point on it, but even only a generation or two ago if someone was attracted to girls in their early teens one had outlets that either don't exist or are highly risky. Some of our great-grandfathers and even grandfathers were marrying girls fourteen or younger. It was socially acceptable and legal. In the 19th Century it was the plauge in child prostitution which drove the changes in Age-of-Consent, but there was no difference between the punishment for having sex with an 18 year old and a 14 year old prostitute..
We see more because what passed as everyday in our great-grandfathers day is now considered bad, but that hasn't stopped it happening.
Now it's pretty obvious why AOC has risen - education takes longer, society is more complex. A 12 year-old might be considered a worthy apprentice in 1880. He'd be as capable in that world as an eighteen year-old is in ours. Now men attracted to teenage girls screw up young women's lives, rather than probably taking her to tea with the neighbours.
So whilst it appears more prominent, it's probably no more frequent, and quite probably better than most of the 19th Century... and the victims today are freer to speak out... but that doesn't mean there weren't as many in the 50's that suffered in silence.