Robert A. Muenchen is maintaining a report here on the popularity of R, a programming environment for statistics.
He's got a bunch of measures, but these really caught my eye. A site called Rexter Analytics did a survey in 2010 asking respondents which pieces of software they used in 2009. These were the results:
Now we come the the results that worry me. Muenchen also did an analysis of Google Scholar citations of software packages, and produced this graph.
I'm not worried because I think academics should be using R (even though I do). It has more to do with the fact that people in academia like to think of themselves as the forward thinkers, and the innovators of new ideas. But in this regard they are clearly following behind the trend that everyone else is setting. Maybe it's fitting that the SPSS curve looks not unlike what I'd imagine an ivory tower to be.