I have no idea. My lowest index ever was in 1991ish....@ +2.6 Currently, I'm a 4.4
You could build a Walmart between those two.....lol. I got out of the golf business in 1995 and went to work for one of the members of the club I worked at (Quail Hollow Club). I proceeded to take a 7 yr sabbatical from golf and never missed it. I started back playing in 2002 and played for 3 yrs.....qualified for the NC Mid-Am and finished middle of the pack. I looked around and noticed everyone who beat me touched a club every day (I knew most of them). I quit again......this time for 17 yrs. I picked it up again in 2022 and joined my current club. Even if I'm not a weekend warrior, I feel like one.
I did do something a few weeks back I've never done. I parred my first 17 holes in a club tournament....and birdied the last hole. I've shot lower scores, but never had I finished with a clean card (no bogeys). My best days are behind me (playing), but I'm having more fun than ever.