Who has a link that shows total # of Subys sold by model and year? Either there was significant yearly differences or some years were more durable?

Durability has nothing to do with a particular year. But more durable is rather easy to spell out:

 

EA81 > EA82 > .............EA82T

 

SPFI > MPFI > Carb**

 

** placement of carb is matter of preference.

^^ Agreed.

 

and it also mostly depends on how the car was treated, either how it was driven or kept when not driven etc.

here is the sales figures: http://www.cars101.com/subaru_archives.html

 

that I was looking for.