Someone must have stats on this but just at a quick glance it appears that at least 75% of goals are scored top shelf. All goalies now appear to be "kneelers", kneeling on their pads for almost every shot, leaving the top corners exposed. I recollect reading that Eddie Shore had his goalies practicing tied with ropes to the crossbar so they would not flop and would not get beat top shelf. 

What is really amazing is how surprised the goalies appear when they get beat up high. I guess they do not realize the net is higher than their shoulders when they are on their knees.