On wiki it says 1998. I watched it back when I was 5-8 (dunno exactly). You should watch it. It's so good.
I dunno how you can't get into it. D:
Romance! Tragedy! Comedy!
The trinity of awesome.
Oh I really need to watch the 3rd Series. I remember watching parts of it back when I was younger but I never liked it because it had different actors. Wiki makes the storyline sound awesome.