That was a quick google for stats.  I'm pretty sure the national numbers are running pretty hard against SUVs right now ... this one is a little old, March  06:

US Sales of Full-Size SUVs Continued Decline in March

Yeah, SUV sales are tanking, thank God. I look forward to that if only because there will be a great gain in humor nationwide watching obese ex-SUV-owners get in and out of small cars lol!