Something I noticed this year in particular was the fact that 2016 queens ramped up brood-rearing slowly and produced a much lower crop compared to 2017 queens. My guess is that the late spring was to blame. However the crop in general was excellent for me this year. It's a shame there is no clover to speak of around me so there's a dearth until Ivy comes to the rescue.
One swarm from 11 full-sized colonies. 800kg.