Don’t know that but:
Stationed Spain 60-64, Germany 64-66, Italy 68-71, worked civilian, Spain 90-92. We bought local currency £, fr, p, l, dm etc, went to Gibraltar / Switzerland, changed all. By time back to $, we had more money. Not a lot but more. $ was worth 8 -10 then. Lived in 5 star hotels for what I spend at Motel 8 now. Last there (99-2000), $ bought (except for gas) twice what bought here. European friends visit often now because USA biggest bargain on planet now. World knows we’re broke and why. Eggs, copper, bobby pins, milk, hinges, cheese, ball bearings, cotton, gas etc, rationed during WWI & II-everybody knew war was on. Nobody feels now because temporarily, China-Russia fronting money for this one. European friends never take dollars back now. I want Euros this time.