Which pieces have the best survival chances in a game

As a bit of fun, a computer programmer has calculated the percentage survival rate for each piece at the end of a game.

Aside from the King, on average h-pawns have the least chance of being taken during a game.

see http://www.quora.com/What-are-the-chances-of-survival-of-individual-chess-pieces-in-average-games for more details.