If there were that list, other applicants wouldn't be allowed to apply. Look, sooner or later, nearly all applicants receive their PPRs. So what's the reason to give some priority to some particular NOCs? I think it doesn't make sense to make "less interesting" applicants come to Canada one month after "more interesting".
Moreover, let's imagine that we have two applicants with the same medical exam date, same AOR date but with different occupations, and one of them is given priority based on the NOC. Although one will get PPR, for example, one month earlier, they both will have the same date (based on their medical exam) in their visa. The only difference is that the second one will have less time to jump to the plane, and will come to Canada less prepared. If look at things this way, it'd much more reasonable to give "less prospective" NOCs more time (and earlier visas) to be able to get more prepared.
I know that waiting is unbearable sometimes, and we all try to find out some trends. I do believe in Occam's razor principle: we shouldn't consider things like something overcomplicated, maybe there is no trend at all.
Just my humble opinion. The only way to know the truth is to become an agent by yourself I guess