For those seeking a more level-headed view, the Fed reports on foreign-owned gold monthly. Going back a couple of decades:
Month Book value ($M) Tonnes
July 2006 8,967 6,606
July 2011 8,412 6,197
July 2016 7,883 5,807
July 2021 7,794 5,742
July 2026 7,812 5,755
The linked report is talking about a change of 1.5% from the latest-reported total amount in tonnes.