I wasn't able to get any specific numbers, but I did get this from Aaron:
"The last few years the Slides have been open more than average. This year they've been open for 12 days. I think we are at a more comfortable place with how we manage them. We encourage patrol to evaluate their status daily. Patrol knows how much the skiers and riders love them ... and many members of the patrol have been furthering their education in avalanche forecasting and emergency back country rescue."