What's Steve Jobs HPA?

In sports, averages and ratings are calculated for everything. Baseball is full of players stats such as RBIs and ERAs. In (American) football, quarterbacks have YPAs and in basketball there are stats on free throws and rebounds to name but a few. I was wondering today whether you could also create stats for business leaders. For example how many of the products Steve Jobs has unveiled in the last few years have gone on to be hits? Put another way, what's his Hits Per Announcement, or HPA, average? If such a score could be calculated it would probably show that Apple's CEO is scoring well. The logical conclusion being that he must be taking performance enhancing drugs and will likely face a grand jury some time in the next year or two, once they've finished with Barry Bonds.