Indicates that something happens or is done once each year, on a yearly basis.
In this town, a festival is held every year.
The contract is renewed annually.
Standard spelling using the suffix ごと.
Kanji spelling using 毎; less common but still seen.
Compound of 一年 (one year) and the suffix ごと (every). The suffix ごと attaches to nouns indicating time or units to express 'every ~'.