Gimme a break... [Jotaro shoves his hands in his pockets and firmly resolves not to think about the whole time travel thing until later, when it's not in the way of finding out whether Dio's got a successor out there building an army.]

198x, Japan. I'd already started high school. My mom's wound up making her sick. I finally dealt with the guy responsible a couple weeks ago, but he had followers and business partners we never even met who are still out there.

[There, is that enough info to pay for finding out how many Stand users there are in the future?]