There are 42 official known neurons, not 72.
In the link you posted, vpGeek is displaying neurons in the “Known Neuron Voting Participation (73)” section that aren’t known neurons. Since all such neurons recently became private by default, their voting history is no longer available, and presumably that’s why vpGeek has them listed as “Not Voted”. I’m sure vpGeek has plans to update their dapp to support private neurons properly.
The DFINITY known neuron (27) did vote.
Okay, @wpb types faster than me.