Supplementary Table S1. Genetic indices and five-year import volumes of the top 100 imported Holstein bulls in Taiwan (2020–2024)

This dataset contains Supplementary Table S1 summarizing the genetic indices and five-year semen import volumes of the top 100 imported Holstein bulls in Taiwan from 2020 to 2024.The table includes cumulative import doses, breeding values (TPI, NM$, milk yield, somatic cell score, productive life, daughter pregnancy rate), A2 β-casein genotypes, and cluster classifications.These data support the analyses presented in the associated Journal of Dairy Science article on bull usage patterns and semen importation trends in a subtropical dairy system.