Are there any stats I could mine for this (and other) information? I want to get an idea of how much winners go all in, compared with for example me.
Other than mining published tournament data or summaries of your own data sets, I don't believe there are direct avenues to access this specific kind of data. That said I'd be willing to bet, with almost absolute certainty, that there isn't a tourney in history (with significant participants) where the winner wasn't all in at some point prior to the final hand.
That said, the frequency of their all ins is tempered by the stack size they posses. Better players = larger average stack size so it probably less than average frequency, but considering chip-to-stack ratio it's still probably all in multiple times per tournament.
Equity per decision is probably more relevant.