LOL, yuppers, me the same! ‘Cept, I just have a silver quarter and silver dime pulled from circulation from my younger years. Inherited a silver dollar from my grandfather.
I had a few grams of gold, but I sold them years back. And, yes, I reported the profit and paid taxes on it. (Bought 'em under melt, then sold them at full melt. When spot was under $2K. )
I believe anoynmity is granted and they are asking only about any increase/decrease...not the amounts. Not much different than CTOs being asked about their technology CAPX.
That chart was from the World Gold Council's Central Bank Survey: https://www.gold.org/goldhub/research/central-bank-gold-reserves-survey-2026 Lots of good stuff there, click around.