The Numbers has a weekend tracker for each year: https://www.the-numbers.com/box-office-records/domestic/all-movies/weekend/released-in-2024
I will resolve this based on the column "No. 1 / Combined" [1] for the weekend of March 1st.
For example, "Dune" (2021) released on October 22nd, and its "No. 1 / Combined" column lists 42%. Thus, it would have resolved NO. This is the equivalent number I will use, however it is computed. (Note that this is all domestic).
I will use whatever level of precision is displayed by The Numbers (i.e. 80% resolves NO, regardless of the true decimal).
For further reference:
For an example of a very high %, "Spider Man: No Way Home" accounted for 92% of the box office on its opening weekend.
Similarly, "Dune: Part Two" has almost no competition on its opening weekend, although its projected opening is fairly low compared to most that break >80%.
The highest proportion for 2024 so far is 29% ("Argylle" on its opening weekend).
[1] This assumes that "Dune: Part Two" is #1 at the box office. It will, but if it somehow isn't, then this market must naturally resolve NO (it cannot be >50%), and so I won't need to compute anything further.
@mattyb I think I just misclicked a week later than usual (although normally i set the close date a while after i expect the numbers to be available anyways)