You have to be looking at ones in their 50's or 60's to find those that have been doing it the longest.
That was what I was hinting at in the ungentlemanly second part of my earlier post, overhead!
An AW Search for WGs in this neck of the woods with an upper age-limit of, say, 55 will, erm, "throw up" [pun only half-intended!] more than a few. I saw one earlier this year who claims to be 49. "Yeah, right!", as they say in Australia!
Mind you, there's even one who works not far from me who seems not only to have mastered Peter Pan's ability to never grow any older but, speaking from memory, is younger now that she's an Indie than when I saw her in a Parlour 7 years ago. Her first FR on Pro$$ienet will be 10 years old later this year and she's only "34" now. I repeat the Aussie phrase!