At what year did Toyota Celicas start getting sunroofs?

I've noticed that the newer (2000+) Toyota Celicas, some of them have a sunroof while some do not. What year did they start adding them? Or is it a separate option or model?|||Well when I bought my 72 Corolla from the dealer, there was a Celica there with a sun roof on it. So it must at least go back that far.