How many are "new guys"?
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Good question.
From: http://smh.com.au/news/World/Conclave-of-cardinals-to-pick-successor/2005/04/01/1112302242051.html?oneclick=true
"There are 117 cardinals under 80. Of these nearly 100 were appointed by John Paul II, and are likely to reflect his conservative views in the choice of successor, Vatican watchers believe.
The next pontiff is certain to come from among the cardinals themselves, although the prelates could in theory elect any baptised male."