I'm gonna guess around 75/25, with casting being the 75. Most of it has to do with the fact that I only own one crappy spinning rod, when I upgrade here soon I'm sure it'll be more like 60/40. Esp when I start experimenting with shaky heads and drop shotting.
I use spinning gear for 1/16-1/8 T-rigs, skipping docks, and Pop R's. My 7' M BCer does the rest of 1/4 T rigs, lighter jigs, spinnerbaits, Senkos, shallow diving cranks, etc.