The primary thing I'm after would have: single UTXO value, UTXO count.
I think it is possible by parsing BitcoinCore database of UTXO.
Every full node keeps up-to-date list of current utxo set in very simple format.
Loading this data into a spreadsheet should not be difficult.
(Note: I do not see any reason to plot such graph, so I not a person for hire)