It WAS only a couple of years ago. One of the kids in our homeschooled teen group has one of them. He obviously wears it as an 'in your face' about homeschooling!
Then mlmr said: "I would bet the ranch it was about 95."
Sorry, I think you loose the ranch.
Here's a Time Mag article from Aug, 2001 about this.
And here's a bulletin board message written 8/9/2001 referencing an article on Drudge about this.
And lastly, here's another bulletin board message from Feb, 2002 about this. Interestingly, this bulletin board is from www.ifeminists.com
Looks like August, 2001 to me.