In one recent historical society presentation looking at locally constructed ships, we learned that a working span of 50 years or so “was a long time” for such vessels.
Many went down at sea, of course, and captains routinely expected to lose a proportion of their crew to death on each extended voyage.
I suspect hard numbers are hard to find, though I’m curious.
Besides, are there really as many retired boats propped up in yards and boatyards around here as there are people? Sometimes it seems that way.
And I can think of the remains of three sailing vessels that are visible at low tide.
So here I am, out on the waters for the better part of the week on a 152-year-old schooner, assuming that the odds are in our favor.
Jnana's Red Barn 
The average, I was told, was around 25 years.