A report on hiring in higher education is available here. While it is ostensibly about the second quarter of 2009, it covers long-term trends as well.
One thing to note is that it focuses on job postings rather than actual hires; last year, quite a few jobs were posted and never filled due to budget cuts or hiring freezes.
By the way, the job season hasn't quite geared up yet. I've seen two job postings in higher ed, neither of which I'm qualified for - one for a dean and the other for someone researching community colleges.
Edited to add: Actually, there are two community college positions, at Morgan State and at Old Dominion.