“2-yr mean citedness” is the OpenAlex field summary_stats.2yr_mean_citedness (CC0): mean citations per paper over a two-year window. It is a raw bibliometric field, not a journal rating, and is not used for default ranking.
Health Professions25Agricultural and Biological Sciences19Medicine14Chemistry8Economics, Econometrics and Finance7Pharmacology, Toxicology and Pharmaceutics6Medicine: Therapeutics. Pharmacology1