Old Macs, Big Macs, and Last Snacks

As I was delivering Meals on Wheels to elderly shut-ins in Seine, I began to wonder as I handed each package of food to its recipient. In keeping with the subconscious trend in the American population to eat more and to be served bigger meals, were these packages larger than before, containing much more food than, say, in the 1960s or so? As far as that goes, I wonder if last meals for about-to-be-executed prisoners in U.S. prisons are larger than they were thirty or forty years ago? That wouldn't be healthy.