They have certainly lowered since the fork last year, I wrote a post using the EL stats to show that, at least here, CR rewards are bunching up.
I don’t usually take any out but have done on occasion, but could be that SP is moving around and so some you would expect to see didn’t appear this time.
Thanks for clearing that up. It's just an interesting observation. I do think that if and when Steem goes to the moon, curation rewards will be easier to earn than author rewards because it is a more steady income. So it is interesting to see this decline for some of the people who were doing the best.