I'm over 70

Sitting at the bus stop today I was humming Joplin's 'Mercedes Benz' and I realised for the first time since hearing it in 1965 (also my introduction to Robert Crumb's art, actually) that the line was not 

"Oh lord won't you buy me a colour TV.
Darling, four dollars is tryin' to find me -
I'll wait for delivery each day until three:
Oh lord won't you buy me a colour TV."

but rather

"Oh lord won't you buy me a colour TV.
Dialling for dollars is tryin' to find me - 
I'll wait for delivery each day until three:
Oh lord won't you buy me a colour TV."

Fifty-five years.