what year is my SC17 ?

Hello all, new user here! I searched and can't find the answer. I have a Supercat 17, sail number 181. Hulls have different numbers on them, last 2 digits on right hull 84 last 2 digits on left hull 85. The sail number 181 is hand scribed in the middle of the hull number so the sail # is valid.
I've seen Bill Roberts post here..help!
Just sold my H18. Have never sailed the SC yet. My friend's father had a 19 back in the 80's named "Moonraker" and I've been in love with the SC's since then.
Thank you in advance for any assistance.
Mike
Western NY
Lake Ontario
Keuka Lake