Tens of thousands of books?
Assuming you really mean 73 years of reading and not the 73 years you've been alive, that gives you 26,663 days of reading time. Assuming the very lowest figure that could be called 'tens of thousands', i.e. 10,000, that means you've read a whole book roughly every 2 and a half days consistently for 73 years, and that's forgetting the fact that you said 'tens' of thousands, which brings your reading time for each book down to a day or less. You're either Rain Man himself or a bold liar.