Sure, but I just wanted to replace the "KNOWN" in your post with something a bit softer, to reflect the fuzzy nature of that number.
I suppose that number is fine as well, but it is also derived from one person's estimates/assumptions, not on hard data.
I wonder if the loss rate was higher in the '80's when these cars were still fairly new. Back then, more people may have been using them as "regular cars", exposing them to more dangers. Also, it was probably harder to get a wreck back on the road back then (after the demise of the dealer network, but before a strong vendor network and forum support was established).