Chessbase - can't find interpretation

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Avatar of MadLuc

This is a screenshot of the statistics page in Chessbase. I can not find any help from Chessbase.

 

Does anyone know what these numbers mean? I know the stats are showing from my games, the percentage of time pieces survive to the end of the game, but for instance, the Rook on a1, I think the green text is how often as white, my rook survives to the end of the game?  but what is the black text showing, how many games?