Or , as most artists would answer the question of which is your best album? 

The next!

'71 maybe. By end of 1972, it was all over. I was 18, bought The Jimi Hendrix Experience in 8th grade, and I think the last rock record I bought was as a freshman in college, Dark Side of the Moon. That's about as far as it went I think.  5 years. A massive creative output by a hundred or so bands all tolled. Not too many people realize that in those days you could hear everything. Every release made it to the shelves and there not that many each month. And between your friends and you, if you bought records, you basically knew what was out there. By '69 FM radio was the third leg. OLh yes, I did buy Blood on the Tracks, friends bought the next stuff, Springsteen, Al Steward, later Fleetwood Mac, later Bowie, but it had run its course.

I agree with @markmoskow ...I think '72 was great too. After than yeah, a long decline.  I mean, disco hit in the mid-70s, rock music had died by the mid-1980s, now it seems "popular" music is just a vehicle to sell singer branded merch and make them rich. It isn't even about the music. They become a "brand" that people want to associate themselves with...women buying handbags and perfumes with "Taylor" on them and all that. 

I mean listen to any average radio station today. It isn't the 1960s or 1970s anymore.  Different strokes for different folks.  I'm glad to have been able to take it all in from around 1965 till now and watch it (and hear it) zig and zag and change and move.  

But I think my interest in jazz (from all eras) is a reflection that rock is dead. 

I was born in 1958.  That is an impressive list that the OP compiled.  Music was very important to me and I definitely felt a few years later as if popular music had lost itself, and I drifted into Classical

Ignore the relativists- the list is correct, if incomplete. I’m not a boomer- history will confirm 1971 as the peak year in cultural history, warts and all!

PS 1973 comes close- I buy albums from then blind and am usually amazed at their great sound and energy.