I do not, because that is a fool's calculation.
The value created is not one year's salary, it's the difference in the present value of an individual without a job and the present value of an individual with a job, including all estimable secondary effects (both positive and negative.) If you simply divide it and compare it to a year's salary, you'll sit there and go 'HURRR THAT IS DUMB', but in reality, you're proving only that you don't really understand policy analysis.
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I'm reminded of a situation that occurred many years ago in my career, when I was still working in a corporate setting. My team hit a seemingly intractable combinatorial explosion problem while trying to create a tool for the sales force. It was incredibly difficult, and quickly blew through the allocated budget (which we'd told them right from the gate, was inadequate).
The management just assumed we were lying... that we weren't up to this task, or we were just lobbying for more money and man-power for our group (I was trying to make a very specific high-end hire to help, and I had already purchased some serious iron). In fact, they were so convinced that this couldn't be this difficult to accurately analyze that they started shopping consultancies, and most agreed with us, that this would be difficult and expensive... but one did not. One said "yes, we can build it, no problem."
A year later, the consultancy had burned through a pile of money, and had nothing to show for it.
Only then did management recognize that maybe this seemingly simple configuration problem was not, in fact, as simple as they imagined. And perhaps we weren't just lying or waving our hands when we said "this shit is not as simple as you think it is." (and even then, they didn't admit it outright. I had an all-day meeting which consisted solely of them asking me stupid question after stupid question, as to why various simple approaches wouldn't work... and me having to draw out specific examples on a whiteboard, indicating the business and technical problems with these simple approaches.)
It's sad, but common, for people to assume that other people's jobs are easier than they really are. Even very smart people fall into that trap... but generally speaking if intelligent, hard-working people are advocating something that seems stupid to you, it's probably because you don't understand the problem or the solution.