[learc83]

>older people in their 50's and 60's

I edited "most people" to "many people" because I really don't have the numbers.

From anecdotal experience from friends and family, I'd think most people won't make it through 40 years of hard manual labor without injury. For every 60 year old you see on a job site, we don't know how many of their peers have stopped working construction.