Every year; used to indicate something that happens or changes year by year (can be used as an adverb or noun).
会社の業績は年ごとに少しずつ改善している。
The company's performance has been improving little by little year by year.
この祭りは年ごとに参加者が増えている。
The number of participants in this festival increases every year.
年ごとに健康診断を受けている。
I get a health check every year.